diff --git a/packages/decdk/package.json b/packages/decdk/package.json
index 8c88b06c25a72..e4b3d63bfc87f 100644
--- a/packages/decdk/package.json
+++ b/packages/decdk/package.json
@@ -163,7 +163,7 @@
     "@types/yaml": "1.2.0",
     "@types/yargs": "^13.0.3",
     "jest": "^24.9.0",
-    "jsii": "^0.20.3"
+    "jsii": "^0.20.5"
   },
   "keywords": [
     "aws",
diff --git a/tools/cdk-build-tools/package.json b/tools/cdk-build-tools/package.json
index 41668d8d0ce70..b90d2ce4a7e09 100644
--- a/tools/cdk-build-tools/package.json
+++ b/tools/cdk-build-tools/package.json
@@ -41,7 +41,7 @@
     "colors": "^1.4.0",
     "fs-extra": "^8.1.0",
     "jest": "^24.9.0",
-    "jsii": "^0.20.3",
+    "jsii": "^0.20.5",
     "jsii-pacmak": "^0.20.3",
     "nodeunit": "^0.11.3",
     "nyc": "^14.1.1",
diff --git a/yarn.lock b/yarn.lock
index 0c420897acb59..2d35ad8ab007c 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -4812,16 +4812,16 @@ jsii-spec@^0.20.3, jsii-spec@^0.20.5:
   dependencies:
     jsonschema "^1.2.4"
 
-jsii@^0.20.3:
-  version "0.20.3"
-  resolved "https://registry.yarnpkg.com/jsii/-/jsii-0.20.3.tgz#088455e65bb45b9730789c62d36feb6f1c73803c"
-  integrity sha512-lLunNBE3RxOIHUKv1FAqJgepaeF8E+oFxAV7zSwJhl4g3Kh91zRNp8ZQ7U1ylBPM+mubPNdkDlQfrR6ghxonCg==
+jsii@^0.20.5:
+  version "0.20.5"
+  resolved "https://registry.yarnpkg.com/jsii/-/jsii-0.20.5.tgz#8ed362f09dcf77fcf549da619a914137366c02ba"
+  integrity sha512-DKqclf82Yj31FoSFCpM3GL4zeQnReq1Dzx5FX9QMLJjZTCx/myJigHW2qVsCPdjayE6ot51LZrJa6nZfiRQPVQ==
   dependencies:
     case "^1.6.2"
     colors "^1.4.0"
     deep-equal "^1.1.0"
     fs-extra "^8.1.0"
-    jsii-spec "^0.20.3"
+    jsii-spec "^0.20.5"
     log4js "^5.3.0"
     semver "^6.3.0"
     sort-json "^2.0.0"