diff --git a/package-lock.json b/package-lock.json
index be879ca..b4fa82c 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,16 +1,16 @@
 {
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-      "version": "2.88.0",
-      "resolved": "https://registry.npmjs.org/request/-/request-2.88.0.tgz",
-      "integrity": "sha512-NAqBSrijGLZdM0WZNsInLJpkJokL72XYjUpnB0iwsRgxh7dB6COrHnTBNwN0E+lHDAJzu7kLAkDeY08z2/A0hg==",
+      "version": "2.88.2",
+      "resolved": "https://registry.npmjs.org/request/-/request-2.88.2.tgz",
+      "integrity": "sha512-MsvtOrfG9ZcrOwAW+Qi+F6HbD0CWXEh9ou77uOb7FM2WPhwT7smM833PzanhJLsgXjN89Ir6V2PczXNnMpwKhw==",
       "dev": true,
       "requires": {
         "aws-sign2": "~0.7.0",
@@ -3955,7 +3966,7 @@
         "extend": "~3.0.2",
         "forever-agent": "~0.6.1",
         "form-data": "~2.3.2",
-        "har-validator": "~5.1.0",
+        "har-validator": "~5.1.3",
         "http-signature": "~1.2.0",
         "is-typedarray": "~1.0.0",
         "isstream": "~0.1.2",
@@ -3965,11 +3976,20 @@
         "performance-now": "^2.1.0",
         "qs": "~6.5.2",
         "safe-buffer": "^5.1.2",
-        "tough-cookie": "~2.4.3",
+        "tough-cookie": "~2.5.0",
         "tunnel-agent": "^0.6.0",
         "uuid": "^3.3.2"
       }
     },
+    "resolve": {
+      "version": "1.17.0",
+      "resolved": "https://registry.npmjs.org/resolve/-/resolve-1.17.0.tgz",
+      "integrity": "sha512-ic+7JYiV8Vi2yzQGFWOkiZD5Z9z7O2Zhm9XMaTxdJExKasieFCr+yXZ/WmXsckHiKl12ar0y6XiXDx3m4RHn1w==",
+      "dev": true,
+      "requires": {
+        "path-parse": "^1.0.6"
+      }
+    },
     "resolve-url": {
       "version": "0.2.1",
       "resolved": "https://registry.npmjs.org/resolve-url/-/resolve-url-0.2.1.tgz",
@@ -3990,7 +4010,7 @@
     },
     "safe-regex": {
       "version": "1.1.0",
-      "resolved": "http://registry.npmjs.org/safe-regex/-/safe-regex-1.1.0.tgz",
+      "resolved": "https://registry.npmjs.org/safe-regex/-/safe-regex-1.1.0.tgz",
       "integrity": "sha1-QKNmnzsHfR6UPURinhV91IAjvy4=",
       "dev": true,
       "requires": {
@@ -4005,7 +4025,7 @@
     },
     "semver": {
       "version": "4.3.6",
-      "resolved": "http://registry.npmjs.org/semver/-/semver-4.3.6.tgz",
+      "resolved": "https://registry.npmjs.org/semver/-/semver-4.3.6.tgz",
       "integrity": "sha1-MAvG4OhjdPe6YQaLWx7NV/xlMto=",
       "dev": true
     },
@@ -4025,17 +4045,17 @@
       },
       "dependencies": {
         "semver": {
-          "version": "5.6.0",
-          "resolved": "https://registry.npmjs.org/semver/-/semver-5.6.0.tgz",
-          "integrity": "sha512-RS9R6R35NYgQn++fkDWaOmqGoj4Ek9gGs+DPxNUZKuwE183xjJroKvyo1IzVFeXvUrvmALy6FWD5xrdJT25gMg==",
+          "version": "5.7.1",
+          "resolved": "https://registry.npmjs.org/semver/-/semver-5.7.1.tgz",
+          "integrity": "sha512-sauaDf/PZdVgrLTNYHRtpXa1iRiKcaebiKQ1BJdpQlWH2lCvexQdX55snPFyK7QzpudqbCI0qXFfOasHdyNDGQ==",
           "dev": true
         }
       }
     },
     "set-value": {
-      "version": "2.0.0",
-      "resolved": "https://registry.npmjs.org/set-value/-/set-value-2.0.0.tgz",
-      "integrity": "sha512-hw0yxk9GT/Hr5yJEYnHNKYXkIA8mVJgd9ditYZCe16ZczcaELYYcfvaXesNACk2O8O0nTiPQcQhGUQj8JLzeeg==",
+      "version": "2.0.1",
+      "resolved": "https://registry.npmjs.org/set-value/-/set-value-2.0.1.tgz",
+      "integrity": "sha512-JxHc1weCN68wRY0fhCoXpyK55m/XPHafOmK4UWD7m2CI14GMcFypt4w/0+NV5f/ZMby2F6S2wwA7fgynh9gWSw==",
       "dev": true,
       "requires": {
         "extend-shallow": "^2.0.1",
@@ -4091,9 +4111,9 @@
       "dev": true
     },
     "signal-exit": {
-      "version": "3.0.2",
-      "resolved": "https://registry.npmjs.org/signal-exit/-/signal-exit-3.0.2.tgz",
-      "integrity": "sha1-tf3AjxKH6hF4Yo5BXiUTK3NkbG0=",
+      "version": "3.0.3",
+      "resolved": "https://registry.npmjs.org/signal-exit/-/signal-exit-3.0.3.tgz",
+      "integrity": "sha512-VUJ49FC8U1OxwZLxIbTTrDvLnf/6TDgxZcK8wxR8zs13xpx7xbG60ndBlhNrFi2EMuFRoeDoJO7wthSLq42EjA==",
       "dev": true
     },
     "slash": {
@@ -4194,9 +4214,9 @@
           "dev": true
         },
         "kind-of": {
-          "version": "6.0.2",
-          "resolved": "https://registry.npmjs.org/kind-of/-/kind-of-6.0.2.tgz",
-          "integrity": "sha512-s5kLOcnH0XqDO+FvuaLX8DDjZ18CGFk7VygH40QoKPUQhW4e2rvM0rwUq0t8IQDOwYSeLK01U90OjzBTme2QqA==",
+          "version": "6.0.3",
+          "resolved": "https://registry.npmjs.org/kind-of/-/kind-of-6.0.3.tgz",
+          "integrity": "sha512-dcS1ul+9tmeD95T+x28/ehLgd9mENa3LsvDTtzm3vyBEO7RPptvAD+t44WVXaUjTBRcrpFeFlC8WCruUR456hw==",
           "dev": true
         }
       }
@@ -4217,12 +4237,12 @@
       "dev": true
     },
     "source-map-resolve": {
-      "version": "0.5.2",
-      "resolved": "https://registry.npmjs.org/source-map-resolve/-/source-map-resolve-0.5.2.tgz",
-      "integrity": "sha512-MjqsvNwyz1s0k81Goz/9vRBe9SZdB09Bdw+/zYyO+3CuPk6fouTaxscHkgtE8jKvf01kVfl8riHzERQ/kefaSA==",
+      "version": "0.5.3",
+      "resolved": "https://registry.npmjs.org/source-map-resolve/-/source-map-resolve-0.5.3.tgz",
+      "integrity": "sha512-Htz+RnsXWk5+P2slx5Jh3Q66vhQj1Cllm0zvnaY98+NFx+Dv2CF/f5O/t8x+KaNdrdIAsruNzoh/KpialbqAnw==",
       "dev": true,
       "requires": {
-        "atob": "^2.1.1",
+        "atob": "^2.1.2",
         "decode-uri-component": "^0.2.0",
         "resolve-url": "^0.2.1",
         "source-map-url": "^0.4.0",
@@ -4255,9 +4275,9 @@
       }
     },
     "spdx-exceptions": {
-      "version": "2.2.0",
-      "resolved": "https://registry.npmjs.org/spdx-exceptions/-/spdx-exceptions-2.2.0.tgz",
-      "integrity": "sha512-2XQACfElKi9SlVb1CYadKDXvoajPgBVPn/gOQLrTvHdElaVhr7ZEbqJaRnJLVNeaI4cMEAgVCeBMKF6MWRDCRA==",
+      "version": "2.3.0",
+      "resolved": "https://registry.npmjs.org/spdx-exceptions/-/spdx-exceptions-2.3.0.tgz",
+      "integrity": "sha512-/tTrYOC7PPI1nUAgx34hUpqXuyJG+DTHJTnIULG4rDygi4xu/tfgmq1e1cIRwRzwZgo4NLySi+ricLkZkw4i5A==",
       "dev": true
     },
     "spdx-expression-parse": {
@@ -4271,9 +4291,9 @@
       }
     },
     "spdx-license-ids": {
-      "version": "3.0.3",
-      "resolved": "https://registry.npmjs.org/spdx-license-ids/-/spdx-license-ids-3.0.3.tgz",
-      "integrity": "sha512-uBIcIl3Ih6Phe3XHK1NqboJLdGfwr1UN3k6wSD1dZpmPsIkb8AGNbZYJ1fOBk834+Gxy8rpfDxrS6XLEMZMY2g==",
+      "version": "3.0.5",
+      "resolved": "https://registry.npmjs.org/spdx-license-ids/-/spdx-license-ids-3.0.5.tgz",
+      "integrity": "sha512-J+FWzZoynJEXGphVIS+XEh3kFSjZX/1i9gFBaWQcB+/tmpe2qUsSBABpcxqxnAxFdiUFEgAX1bjYGQvIZmoz9Q==",
       "dev": true
     },
     "split-string": {
@@ -4286,9 +4306,9 @@
       }
     },
     "sshpk": {
-      "version": "1.16.0",
-      "resolved": "https://registry.npmjs.org/sshpk/-/sshpk-1.16.0.tgz",
-      "integrity": "sha512-Zhev35/y7hRMcID/upReIvRse+I9SVhyVre/KTJSJQWMz3C3+G+HpO7m1wK/yckEtujKZ7dS4hkVxAnmHaIGVQ==",
+      "version": "1.16.1",
+      "resolved": "https://registry.npmjs.org/sshpk/-/sshpk-1.16.1.tgz",
+      "integrity": "sha512-HXXqVUq7+pcKeLqqZj6mHFUMvXtOJt1uoUx09pFW6011inTMxqI8BA8PM95myrIyyKwdnzjdFjLiE6KBPVtJIg==",
       "dev": true,
       "requires": {
         "asn1": "~0.2.3",
@@ -4325,7 +4345,7 @@
     },
     "string_decoder": {
       "version": "1.1.1",
-      "resolved": "http://registry.npmjs.org/string_decoder/-/string_decoder-1.1.1.tgz",
+      "resolved": "https://registry.npmjs.org/string_decoder/-/string_decoder-1.1.1.tgz",
       "integrity": "sha512-n/ShnvDi6FHbbVfviro+WojiFzv+s8MPMHBczVePfUpDJLwoLT0ht1l4YwBCbi8pJAveEEdnkHyPyTP/mzRfwg==",
       "dev": true,
       "requires": {
@@ -4334,7 +4354,7 @@
     },
     "strip-ansi": {
       "version": "3.0.1",
-      "resolved": "http://registry.npmjs.org/strip-ansi/-/strip-ansi-3.0.1.tgz",
+      "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-3.0.1.tgz",
       "integrity": "sha1-ajhfuIU9lS1f8F0Oiq+UJ43GPc8=",
       "dev": true,
       "requires": {
@@ -4361,7 +4381,7 @@
     },
     "supports-color": {
       "version": "2.0.0",
-      "resolved": "http://registry.npmjs.org/supports-color/-/supports-color-2.0.0.tgz",
+      "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-2.0.0.tgz",
       "integrity": "sha1-U10EXOa2Nj+kARcIRimZXp3zJMc=",
       "dev": true
     },
@@ -4414,21 +4434,13 @@
       }
     },
     "tough-cookie": {
-      "version": "2.4.3",
-      "resolved": "https://registry.npmjs.org/tough-cookie/-/tough-cookie-2.4.3.tgz",
-      "integrity": "sha512-Q5srk/4vDM54WJsJio3XNn6K2sCG+CQ8G5Wz6bZhRZoAe/+TxjWB/GlFAnYEbkYVlON9FMk/fE3h2RLpPXo4lQ==",
+      "version": "2.5.0",
+      "resolved": "https://registry.npmjs.org/tough-cookie/-/tough-cookie-2.5.0.tgz",
+      "integrity": "sha512-nlLsUzgm1kfLXSXfRZMc1KLAugd4hqJHDTvc2hDIwS3mZAfMEuMbc03SujMF+GEcpaX/qboeycw6iO8JwVv2+g==",
       "dev": true,
       "requires": {
-        "psl": "^1.1.24",
-        "punycode": "^1.4.1"
-      },
-      "dependencies": {
-        "punycode": {
-          "version": "1.4.1",
-          "resolved": "https://registry.npmjs.org/punycode/-/punycode-1.4.1.tgz",
-          "integrity": "sha1-wNWmOycYgArY4esPpSachN1BhF4=",
-          "dev": true
-        }
+        "psl": "^1.1.28",
+        "punycode": "^2.1.1"
       }
     },
     "trim-newlines": {
@@ -4459,38 +4471,15 @@
       "dev": true
     },
     "union-value": {
-      "version": "1.0.0",
-      "resolved": "https://registry.npmjs.org/union-value/-/union-value-1.0.0.tgz",
-      "integrity": "sha1-XHHDTLW61dzr4+oM0IIHulqhrqQ=",
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/union-value/-/union-value-1.0.1.tgz",
+      "integrity": "sha512-tJfXmxMeWYnczCVs7XAEvIV7ieppALdyepWMkHkwciRpZraG/xwT+s2JN8+pr1+8jCRf80FFzvr+MpQeeoF4Xg==",
       "dev": true,
       "requires": {
         "arr-union": "^3.1.0",
         "get-value": "^2.0.6",
         "is-extendable": "^0.1.1",
-        "set-value": "^0.4.3"
-      },
-      "dependencies": {
-        "extend-shallow": {
-          "version": "2.0.1",
-          "resolved": "https://registry.npmjs.org/extend-shallow/-/extend-shallow-2.0.1.tgz",
-          "integrity": "sha1-Ua99YUrZqfYQ6huvu5idaxxWiQ8=",
-          "dev": true,
-          "requires": {
-            "is-extendable": "^0.1.0"
-          }
-        },
-        "set-value": {
-          "version": "0.4.3",
-          "resolved": "https://registry.npmjs.org/set-value/-/set-value-0.4.3.tgz",
-          "integrity": "sha1-fbCPnT0i3H945Trzw79GZuzfzPE=",
-          "dev": true,
-          "requires": {
-            "extend-shallow": "^2.0.1",
-            "is-extendable": "^0.1.1",
-            "is-plain-object": "^2.0.1",
-            "to-object-path": "^0.3.0"
-          }
-        }
+        "set-value": "^2.0.1"
       }
     },
     "unset-value": {
@@ -4573,9 +4562,9 @@
       "dev": true
     },
     "uuid": {
-      "version": "3.3.2",
-      "resolved": "https://registry.npmjs.org/uuid/-/uuid-3.3.2.tgz",
-      "integrity": "sha512-yXJmeNaw3DnnKAOKJE51sL/ZaYfWJRl1pK9dr19YFCu0ObS231AB1/LbqTKRAQ5kw8A90rA6fr4riOUpTZvQZA==",
+      "version": "3.4.0",
+      "resolved": "https://registry.npmjs.org/uuid/-/uuid-3.4.0.tgz",
+      "integrity": "sha512-HjSDRw6gZE5JMggctHBcjVak08+KEVhSIiDzFnT9S9aegmp85S/bReBVTb4QTFaRNptJ9kuYaNhnbNEOkbKb/A==",
       "dev": true
     },
     "v8flags": {
diff --git a/package.json b/package.json
index dffe26e..5277699 100644
--- a/package.json
+++ b/package.json
@@ -44,4 +44,4 @@
     "url": "https://github.com/shapesecurity/shift-validator-js/issues"
   },
   "license": "Apache-2.0"
-}
+}
\ No newline at end of file
diff --git a/src/index.js b/src/index.js
index ef56ea3..8ba2eef 100644
--- a/src/index.js
+++ b/src/index.js
@@ -400,6 +400,22 @@ export class Validator extends MonoidalReducer {
     return s;
   }
 
+  reduceStaticMemberAssignmentTarget(node, { object }) {
+    let s = super.reduceStaticMemberAssignmentTarget(node, {object});
+    if (!isIdentifierNameES6(node.property)) {
+      s = s.addError(new ValidationError(node, ValidationErrorMessages.VALID_STATIC_MEMBER_ASSIGNMENT_TARGET_PROPERTY_NAME));
+    }
+    return s;
+  }
+
+  reduceStaticPropertyName(node) {
+    let s = super.reduceStaticPropertyName(node);
+    if (!(isIdentifierNameES6(node.value) || !isNaN(node.value))) {
+      s = s.addError(new ValidationError(node, ValidationErrorMessages.VALID_STATIC_PROPERTY_NAME));
+    }
+    return s;
+  }
+
   reduceTemplateElement(node) {
     let s = super.reduceTemplateElement(node);
     if (!isTemplateElement(node.rawValue)) {
diff --git a/src/validation-errors.js b/src/validation-errors.js
index 16157aa..307221d 100644
--- a/src/validation-errors.js
+++ b/src/validation-errors.js
@@ -41,6 +41,8 @@ export default {
   VALID_AWAIT_EXPRESSION_POSITION: "AwaitExpression is only allowed within an async function or method",
   VALID_YIELD_GENERATOR_EXPRESSION_POSITION: "YieldGeneratorExpression is only allowed within a generator function or method",
   VALID_STATIC_MEMBER_EXPRESSION_PROPERTY_NAME: "The property field of StaticMemberExpression must be a valid identifier name",
+  VALID_STATIC_MEMBER_ASSIGNMENT_TARGET_PROPERTY_NAME: "The property field of StaticMemberAssignmentTarget must be a valid identifier name",
+  VALID_STATIC_PROPERTY_NAME: "The property field of StaticPropertyName must be a valid identifier name",
   VALID_TEMPLATE_ELEMENT_VALUE: "The raw value field of TemplateElement must match the ES6 grammar production TemplateCharacters",
   ALTERNATING_TEMPLATE_EXPRESSION_ELEMENTS: "The elements field of TemplateExpression must be an alternating list of TemplateElement and Expression, starting and ending with a TemplateElement",
   NOT_EMPTY_VARIABLE_DECLARATORS_LIST: "The declarators field in VariableDeclaration must not be an empty list",
diff --git a/test/unit.js b/test/unit.js
index 9d65a7d..42cc07e 100644
--- a/test/unit.js
+++ b/test/unit.js
@@ -41,15 +41,9 @@ suite("unit", () => {
     validExpr(new Shift.IdentifierExpression({name: "$"}));
     validExpr(new Shift.IdentifierExpression({name: "_"}));
     validExpr(new Shift.IdentifierExpression({name: "_$0x"}));
-    validExpr(new Shift.StaticMemberExpression({object: EXPR, property: ID}));
-    validExpr(new Shift.StaticMemberExpression({object: EXPR, property: "if"}));
-    validExpr(new Shift.ObjectExpression({properties: [new Shift.DataProperty({name: new Shift.StaticPropertyName({value: "if"}), expression: EXPR})]}));
     invalidExpr(1, new Shift.IdentifierExpression({name: ""}));
     invalidExpr(1, new Shift.IdentifierExpression({name: "a-b"}));
     invalidExpr(1, new Shift.IdentifierExpression({name: "0x0"}));
-    invalidExpr(1, new Shift.StaticMemberExpression({object: EXPR, property: ""}));
-    invalidExpr(1, new Shift.StaticMemberExpression({object: EXPR, property: "0"}));
-    invalidExpr(1, new Shift.StaticMemberExpression({object: EXPR, property: "a-b"}));
   });
 
   test("IdentifierExpression must not contain Identifier with reserved word name other than let, yield, await, and async", () => {
@@ -231,15 +225,24 @@ suite("unit", () => {
     invalid(1, module);
   });
 
-  test("Static property names must be identifiers", () => {
-    let expr = new Shift.StaticMemberExpression({object: EXPR, property: "if"});
-    validExpr(expr);
-
-    expr.property = "1";
-    invalidExpr(1, expr);
-
-    expr.property = "a^";
-    invalidExpr(1, expr);
+  test("Static property names must be valid", () => {
+    validExpr(new Shift.StaticMemberExpression({object: EXPR, property: "if"}));
+    validExpr(new Shift.StaticMemberExpression({object: EXPR, property: ID}));
+    validExpr(new Shift.StaticMemberExpression({object: EXPR, property: "if"}));
+    validExpr(new Shift.StaticMemberAssignmentTarget({object: EXPR, property: "if"}));
+    validExpr(new Shift.ObjectExpression({properties: [new Shift.DataProperty({name: new Shift.StaticPropertyName({value: "if"}), expression: EXPR})]}));
+    validExpr(new Shift.ObjectExpression({properties: [new Shift.DataProperty({name: new Shift.StaticPropertyName({value: "0"}), expression: EXPR})]}));
+    validExpr(new Shift.ObjectExpression({properties: [new Shift.DataProperty({name: new Shift.StaticPropertyName({value: "0.2"}), expression: EXPR})]}));
+    validExpr(new Shift.ObjectExpression({properties: [new Shift.DataProperty({name: new Shift.StaticPropertyName({value: "0b0"}), expression: EXPR})]}));
+    validExpr(new Shift.ObjectExpression({properties: [new Shift.DataProperty({name: new Shift.StaticPropertyName({value: "0b0"}), expression: EXPR})]}));
+    invalidExpr(1, new Shift.StaticMemberExpression({object: EXPR, property: "1"}));
+    invalidExpr(1, new Shift.StaticMemberExpression({object: EXPR, property: "a&"}));
+    invalidExpr(1, new Shift.StaticMemberExpression({object: EXPR, property: ""}));
+    invalidExpr(1, new Shift.StaticMemberExpression({object: EXPR, property: "0"}));
+    invalidExpr(1, new Shift.StaticMemberExpression({object: EXPR, property: "a-b"}));
+    invalidExpr(1, new Shift.StaticMemberAssignmentTarget({object: EXPR, property: "1"}));
+    invalidExpr(1, new Shift.StaticMemberAssignmentTarget({object: EXPR, property: "a^"}));
+    invalidExpr(1, new Shift.ObjectExpression({properties: [new Shift.DataProperty({name: new Shift.StaticPropertyName({value: "0b"}), expression: EXPR})]}));
   });
 
   test("TemplateElements must not contain forbidden substrings", () => {