diff --git a/docker/base.dockerfile b/docker/base.dockerfile
index 77385f2..9209abb 100644
--- a/docker/base.dockerfile
+++ b/docker/base.dockerfile
@@ -1,6 +1,6 @@
 FROM public.ecr.aws/lambda/provided:al2
 
-ENV DENO_VERSION=1.21.2
+ENV DENO_VERSION=1.21.3
 
 ENV DENO_DIR=.deno_dir
 ENV DENO_INSTALL_ROOT=/usr/local
diff --git a/example-aws-cdk/cdk/example-aws-cdk-stack.ts b/example-aws-cdk/cdk/example-aws-cdk-stack.ts
index d9bb366..3035356 100644
--- a/example-aws-cdk/cdk/example-aws-cdk-stack.ts
+++ b/example-aws-cdk/cdk/example-aws-cdk-stack.ts
@@ -11,7 +11,7 @@ export class ExampleAwsCdkStack extends cdk.Stack {
       location: {
         applicationId:
           "arn:aws:serverlessrepo:us-east-1:390065572566:applications/deno",
-        semanticVersion: "1.21.2",
+        semanticVersion: "1.21.3",
       },
     });
 
diff --git a/example-sam/template.yml b/example-sam/template.yml
index 6e73785..7d96c0b 100644
--- a/example-sam/template.yml
+++ b/example-sam/template.yml
@@ -11,7 +11,7 @@ Resources:
     Properties:
       Location:
         ApplicationId: arn:aws:serverlessrepo:us-east-1:390065572566:applications/deno
-        SemanticVersion: 1.21.2
+        SemanticVersion: 1.21.3
 
   HelloWorldFunction:
     Type: AWS::Serverless::Function
diff --git a/example-serverless/serverless.yml b/example-serverless/serverless.yml
index 2df891e..dd3bcef 100644
--- a/example-serverless/serverless.yml
+++ b/example-serverless/serverless.yml
@@ -64,7 +64,7 @@ resources:
       Properties:
         Location:
           ApplicationId: arn:aws:serverlessrepo:us-east-1:390065572566:applications/deno
-          SemanticVersion: 1.21.2
+          SemanticVersion: 1.21.3
 
     candidatesTable:
       Type: AWS::DynamoDB::Table
diff --git a/tests/Dockerfile b/tests/Dockerfile
index 9497f13..a557d53 100644
--- a/tests/Dockerfile
+++ b/tests/Dockerfile
@@ -3,7 +3,7 @@
 FROM amazonlinux:2.0.20200722.0
 # This is _close to_ the Amazon Linux 2 AMI/image used by AWS Lambda.
 
-ENV DENO_VERSION=1.21.2
+ENV DENO_VERSION=1.21.3
 
 # Note: We make the deno binary private (via _) so that it's not available in the PATH.
 # In order for `deno` to be made available in the PATH it must be inserted into ./bin/
diff --git a/tests/test_bundle.json b/tests/test_bundle.json
index 0ee3933..d13db38 100644
--- a/tests/test_bundle.json
+++ b/tests/test_bundle.json
@@ -7,11 +7,11 @@
   "expected": [
     {
       "status": "ok",
-      "content": "{\"statusCode\":200,\"headers\":{\"content-type\":\"text/html;charset=utf8\"},\"body\":\"Welcome to deno 1.21.2 🦕\"}"
+      "content": "{\"statusCode\":200,\"headers\":{\"content-type\":\"text/html;charset=utf8\"},\"body\":\"Welcome to deno 1.21.3 🦕\"}"
     },
     {
       "status": "ok",
-      "content": "{\"statusCode\":200,\"headers\":{\"content-type\":\"text/html;charset=utf8\"},\"body\":\"Welcome to deno 1.21.2 🦕\"}"
+      "content": "{\"statusCode\":200,\"headers\":{\"content-type\":\"text/html;charset=utf8\"},\"body\":\"Welcome to deno 1.21.3 🦕\"}"
     }
   ],
   "files": ["hello.bundle.js"],
diff --git a/tests/test_example_zip.json b/tests/test_example_zip.json
index 23810ec..30f7f04 100644
--- a/tests/test_example_zip.json
+++ b/tests/test_example_zip.json
@@ -4,11 +4,11 @@
   "expected": [
     {
       "status": "ok",
-      "content": "{\"statusCode\":200,\"headers\":{\"content-type\":\"text/html;charset=utf8\"},\"body\":\"Welcome to deno 1.21.2 🦕\"}"
+      "content": "{\"statusCode\":200,\"headers\":{\"content-type\":\"text/html;charset=utf8\"},\"body\":\"Welcome to deno 1.21.3 🦕\"}"
     },
     {
       "status": "ok",
-      "content": "{\"statusCode\":200,\"headers\":{\"content-type\":\"text/html;charset=utf8\"},\"body\":\"Welcome to deno 1.21.2 🦕\"}"
+      "content": "{\"statusCode\":200,\"headers\":{\"content-type\":\"text/html;charset=utf8\"},\"body\":\"Welcome to deno 1.21.3 🦕\"}"
     }
   ],
   "files": "deno-lambda-example.zip",
diff --git a/tests/test_js.json b/tests/test_js.json
index 7a35af8..825b8de 100644
--- a/tests/test_js.json
+++ b/tests/test_js.json
@@ -4,11 +4,11 @@
   "expected": [
     {
       "status": "ok",
-      "content": "{\"statusCode\":200,\"body\":\"Welcome to deno 1.21.2 🦕\"}"
+      "content": "{\"statusCode\":200,\"body\":\"Welcome to deno 1.21.3 🦕\"}"
     },
     {
       "status": "ok",
-      "content": "{\"statusCode\":200,\"body\":\"Welcome to deno 1.21.2 🦕\"}"
+      "content": "{\"statusCode\":200,\"body\":\"Welcome to deno 1.21.3 🦕\"}"
     }
   ],
   "files": ["hello.js"],
diff --git a/tests/test_run_deno.json b/tests/test_run_deno.json
index 518f9a6..26144a4 100644
--- a/tests/test_run_deno.json
+++ b/tests/test_run_deno.json
@@ -4,11 +4,11 @@
   "expected": [
     {
       "status": "ok",
-      "content": "{\"out\":\"1.21.2\"}"
+      "content": "{\"out\":\"1.21.3\"}"
     },
     {
       "status": "ok",
-      "content": "{\"out\":\"1.21.2\"}"
+      "content": "{\"out\":\"1.21.3\"}"
     }
   ],
   "files": ["handlers.ts"],
diff --git a/tests/test_self_contained.json b/tests/test_self_contained.json
index 191ceee..167a765 100644
--- a/tests/test_self_contained.json
+++ b/tests/test_self_contained.json
@@ -4,11 +4,11 @@
   "expected": [
     {
       "status": "ok",
-      "content": "{\"statusCode\":200,\"headers\":{\"content-type\":\"text/html;charset=utf8\"},\"body\":\"Welcome to deno 1.21.2 🦕\"}"
+      "content": "{\"statusCode\":200,\"headers\":{\"content-type\":\"text/html;charset=utf8\"},\"body\":\"Welcome to deno 1.21.3 🦕\"}"
     },
     {
       "status": "ok",
-      "content": "{\"statusCode\":200,\"headers\":{\"content-type\":\"text/html;charset=utf8\"},\"body\":\"Welcome to deno 1.21.2 🦕\"}"
+      "content": "{\"statusCode\":200,\"headers\":{\"content-type\":\"text/html;charset=utf8\"},\"body\":\"Welcome to deno 1.21.3 🦕\"}"
     }
   ],
   "files": ["hello.ts", "bootstrap", "bin/deno"]
diff --git a/tests/test_simple.json b/tests/test_simple.json
index 80b52cc..d447da6 100644
--- a/tests/test_simple.json
+++ b/tests/test_simple.json
@@ -4,11 +4,11 @@
   "expected": [
     {
       "status": "ok",
-      "content": "{\"statusCode\":200,\"headers\":{\"content-type\":\"text/html;charset=utf8\"},\"body\":\"Welcome to deno 1.21.2 🦕\"}"
+      "content": "{\"statusCode\":200,\"headers\":{\"content-type\":\"text/html;charset=utf8\"},\"body\":\"Welcome to deno 1.21.3 🦕\"}"
     },
     {
       "status": "ok",
-      "content": "{\"statusCode\":200,\"headers\":{\"content-type\":\"text/html;charset=utf8\"},\"body\":\"Welcome to deno 1.21.2 🦕\"}"
+      "content": "{\"statusCode\":200,\"headers\":{\"content-type\":\"text/html;charset=utf8\"},\"body\":\"Welcome to deno 1.21.3 🦕\"}"
     }
   ],
   "files": ["hello.ts"],