diff --git a/Dockerfile b/Dockerfile
index adfa1ae..07488a8 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM alpine:3.14@sha256:eb3e4e175ba6d212ba1d6e04fc0782916c08e1c9d7b45892e9796141b1d379ae
+FROM alpine:3.18
 
 ENV BLUEBIRD_WARNINGS=0 \
   NODE_ENV=production \
diff --git a/package.json b/package.json
index 463a9dd..f1d5287 100644
--- a/package.json
+++ b/package.json
@@ -13,7 +13,7 @@
     "lint": "eslint \"**/*.js\""
   },
   "dependencies": {
-    "express": "4.17.1"
+    "express": "4.17.3"
   },
   "devDependencies": {
     "chai": "^4.2.0",