diff --git a/.stylelintrc b/.stylelintrc
index e3cb0d7cc4a4..dac9edbf4386 100644
--- a/.stylelintrc
+++ b/.stylelintrc
@@ -294,6 +294,7 @@
     "scss/operator-no-newline-before": true,
     "scss/operator-no-unspaced": true,
     "selector-attribute-quotes": "always",
+    "selector-class-pattern": "^[a-z][a-z0-9\\-]*[a-z0-9]$",
     "selector-list-comma-newline-after": "always",
     "selector-list-comma-newline-before": "never-multi-line",
     "selector-list-comma-space-after": "always-single-line",
diff --git a/site/docs/4.1/assets/scss/_syntax.scss b/site/docs/4.1/assets/scss/_syntax.scss
index e66c5da2205b..c03e800f8ae7 100644
--- a/site/docs/4.1/assets/scss/_syntax.scss
+++ b/site/docs/4.1/assets/scss/_syntax.scss
@@ -1,4 +1,4 @@
-// stylelint-disable declaration-block-single-line-max-declarations
+// stylelint-disable declaration-block-single-line-max-declarations, selector-class-pattern
 
 .hll { background-color: #ffc; }
 .c { color: #999; }