diff --git a/dockerfile-lint-extension/extension/package.json b/dockerfile-lint-extension/extension/package.json
index 1451db2..a44715e 100644
--- a/dockerfile-lint-extension/extension/package.json
+++ b/dockerfile-lint-extension/extension/package.json
@@ -78,7 +78,7 @@
     "mkdirp": "^0.5.1",
     "parcel-bundler": "^1.10.3",
     "sourcegraph": "^20.1.0",
-    "tslint": "^5.11.0",
+    "tslint": "^5.20.1",
     "typescript": "^3.1.6"
   }
 }
diff --git a/line-counter/package.json b/line-counter/package.json
index 08b0a96..e685416 100644
--- a/line-counter/package.json
+++ b/line-counter/package.json
@@ -66,7 +66,7 @@
     "mkdirp": "^0.5.1",
     "parcel-bundler": "^1.10.3",
     "sourcegraph": "^20.1.0",
-    "tslint": "^5.11.0",
+    "tslint": "^5.20.1",
     "typescript": "^3.2.1"
   }
 }
diff --git a/py-button/package.json b/py-button/package.json
index 29e8db1..547151e 100644
--- a/py-button/package.json
+++ b/py-button/package.json
@@ -62,7 +62,7 @@
     "mkdirp": "^0.5.1",
     "parcel-bundler": "^1.10.3",
     "sourcegraph": "^20.1.0",
-    "tslint": "^5.11.0",
+    "tslint": "^5.20.1",
     "typescript": "^3.2.2"
   }
 }
diff --git a/skeleton-language-extension/package.json b/skeleton-language-extension/package.json
index 56b8de3..e06153b 100644
--- a/skeleton-language-extension/package.json
+++ b/skeleton-language-extension/package.json
@@ -46,7 +46,7 @@
     "mkdirp": "^0.5.1",
     "parcel-bundler": "^1.11.0",
     "sourcegraph": "^20.1.0",
-    "tslint": "^5.12.0",
+    "tslint": "^5.20.1",
     "typescript": "^3.2.2"
   }
 }