diff --git a/CHANGELOG.md b/CHANGELOG.md
index ab748476..647d7241 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -84,3 +84,6 @@ GlueSchemaRegistryKafkaSerializer/GlueSchemaRegistryKafkaDeserializer.
 
 ## Release 1.1.20
 * Upgrade the dependency version to remove commons:compress dependency
+
+## Release 1.1.21
+* Upgraded Avro dependencies version to fix vulnerabilities
diff --git a/README.md b/README.md
index 31476b1e..a8954a32 100644
--- a/README.md
+++ b/README.md
@@ -60,7 +60,7 @@ The recommended way to use the AWS Glue Schema Registry Library for Java is to c
   <dependency>
       <groupId>software.amazon.glue</groupId>
       <artifactId>schema-registry-serde</artifactId>
-      <version>1.1.20</version>
+      <version>1.1.21</version>
   </dependency>
   ```
 ### Code Example
@@ -490,7 +490,7 @@ It should look like this
 * If using bash, run the below commands to set-up your CLASSPATH in your bash_profile. (For any other shell, update the environment accordingly.)
   ```bash
       echo 'export GSR_LIB_BASE_DIR=<>' >>~/.bash_profile
-      echo 'export GSR_LIB_VERSION=1.1.20' >>~/.bash_profile
+      echo 'export GSR_LIB_VERSION=1.1.21' >>~/.bash_profile
       echo 'export KAFKA_HOME=<your kafka installation directory>' >>~/.bash_profile
       echo 'export CLASSPATH=$CLASSPATH:$GSR_LIB_BASE_DIR/avro-kafkaconnect-converter/target/schema-registry-kafkaconnect-converter-$GSR_LIB_VERSION.jar:$GSR_LIB_BASE_DIR/common/target/schema-registry-common-$GSR_LIB_VERSION.jar:$GSR_LIB_BASE_DIR/avro-serializer-deserializer/target/schema-registry-serde-$GSR_LIB_VERSION.jar' >>~/.bash_profile
       source ~/.bash_profile
@@ -549,7 +549,7 @@ It should look like this
   <dependency>
         <groupId>software.amazon.glue</groupId>
         <artifactId>schema-registry-kafkastreams-serde</artifactId>
-        <version>1.1.20</version>
+        <version>1.1.21</version>
   </dependency>
   ```
 
@@ -587,7 +587,7 @@ repository for the latest support: [Avro SerializationSchema and Deserialization
   <dependency>
        <groupId>software.amazon.glue</groupId>
        <artifactId>schema-registry-flink-serde</artifactId>
-       <version>1.1.20</version>
+       <version>1.1.21</version>
   </dependency>
   ```
 ### Code Example
diff --git a/avro-flink-serde/README.md b/avro-flink-serde/README.md
index d803ac3b..6aceae87 100644
--- a/avro-flink-serde/README.md
+++ b/avro-flink-serde/README.md
@@ -20,7 +20,7 @@ inside Amazon VPC.](https://docs.aws.amazon.com/kinesisanalytics/latest/java/vpc
   <dependency>
        <groupId>software.amazon.glue</groupId>
        <artifactId>schema-registry-flink-serde</artifactId>
-       <version>1.1.20/version>
+       <version>1.1.21/version>
   </dependency>
   ```
 ### Code Example
diff --git a/avro-flink-serde/pom.xml b/avro-flink-serde/pom.xml
index 1901cbed..6bda63c9 100644
--- a/avro-flink-serde/pom.xml
+++ b/avro-flink-serde/pom.xml
@@ -21,7 +21,7 @@
 
     <groupId>software.amazon.glue</groupId>
     <artifactId>schema-registry-flink-serde</artifactId>
-    <version>1.1.20</version>
+    <version>1.1.21</version>
     <name>AWS Glue Schema Registry Flink Avro Serialization Deserialization Schema</name>
     <description>The AWS Glue Schema Registry Library for Apache Flink enables Java developers to easily integrate
         their Apache Flink applications with AWS Glue Schema Registry
@@ -66,7 +66,7 @@
         <dependency>
             <groupId>software.amazon.glue</groupId>
             <artifactId>schema-registry-serde</artifactId>
-            <version>1.1.20</version>
+            <version>1.1.21</version>
         </dependency>
         <dependency>
           <groupId>org.projectlombok</groupId>
diff --git a/avro-kafkaconnect-converter/pom.xml b/avro-kafkaconnect-converter/pom.xml
index de996006..57ed9752 100644
--- a/avro-kafkaconnect-converter/pom.xml
+++ b/avro-kafkaconnect-converter/pom.xml
@@ -32,7 +32,7 @@
     <parent>
         <groupId>software.amazon.glue</groupId>
         <artifactId>schema-registry-parent</artifactId>
-        <version>1.1.20</version>
+        <version>1.1.21</version>
         <relativePath>../pom.xml</relativePath>
     </parent>
 
diff --git a/build-tools/pom.xml b/build-tools/pom.xml
index e6033638..be133227 100644
--- a/build-tools/pom.xml
+++ b/build-tools/pom.xml
@@ -22,7 +22,7 @@
     <parent>
         <groupId>software.amazon.glue</groupId>
         <artifactId>schema-registry-parent</artifactId>
-        <version>1.1.20</version>
+        <version>1.1.21</version>
         <relativePath>../pom.xml</relativePath>
     </parent>
 
diff --git a/common/pom.xml b/common/pom.xml
index 14267498..1e46acc6 100644
--- a/common/pom.xml
+++ b/common/pom.xml
@@ -22,7 +22,7 @@
     <parent>
         <groupId>software.amazon.glue</groupId>
         <artifactId>schema-registry-parent</artifactId>
-        <version>1.1.20</version>
+        <version>1.1.21</version>
         <relativePath>../pom.xml</relativePath>
     </parent>
 
diff --git a/examples/pom.xml b/examples/pom.xml
index dbe548c3..17c4e236 100644
--- a/examples/pom.xml
+++ b/examples/pom.xml
@@ -31,7 +31,7 @@
     <parent>
         <groupId>software.amazon.glue</groupId>
         <artifactId>schema-registry-parent</artifactId>
-        <version>1.1.20</version>
+        <version>1.1.21</version>
         <relativePath>../pom.xml</relativePath>
     </parent>
 
diff --git a/integration-tests/pom.xml b/integration-tests/pom.xml
index 05ea2450..02731a46 100644
--- a/integration-tests/pom.xml
+++ b/integration-tests/pom.xml
@@ -31,7 +31,7 @@
     <parent>
         <groupId>software.amazon.glue</groupId>
         <artifactId>schema-registry-parent</artifactId>
-        <version>1.1.20</version>
+        <version>1.1.21</version>
         <relativePath>../pom.xml</relativePath>
     </parent>
 
diff --git a/jsonschema-kafkaconnect-converter/pom.xml b/jsonschema-kafkaconnect-converter/pom.xml
index b9e480bd..a2ed129e 100644
--- a/jsonschema-kafkaconnect-converter/pom.xml
+++ b/jsonschema-kafkaconnect-converter/pom.xml
@@ -32,7 +32,7 @@
     <parent>
         <groupId>software.amazon.glue</groupId>
         <artifactId>schema-registry-parent</artifactId>
-        <version>1.1.20</version>
+        <version>1.1.21</version>
         <relativePath>../pom.xml</relativePath>
     </parent>
 
diff --git a/kafkastreams-serde/pom.xml b/kafkastreams-serde/pom.xml
index 859eb466..8f539c4b 100644
--- a/kafkastreams-serde/pom.xml
+++ b/kafkastreams-serde/pom.xml
@@ -32,7 +32,7 @@
     <parent>
         <groupId>software.amazon.glue</groupId>
         <artifactId>schema-registry-parent</artifactId>
-        <version>1.1.20</version>
+        <version>1.1.21</version>
         <relativePath>../pom.xml</relativePath>
     </parent>
 
diff --git a/pom.xml b/pom.xml
index 44a4696f..b44bb734 100644
--- a/pom.xml
+++ b/pom.xml
@@ -21,7 +21,7 @@
 
     <groupId>software.amazon.glue</groupId>
     <artifactId>schema-registry-parent</artifactId>
-    <version>1.1.20</version>
+    <version>1.1.21</version>
     <packaging>pom</packaging>
     <name>AWS Glue Schema Registry Library</name>
     <description>The AWS Glue Schema Registry Library for Java enables Java developers to easily integrate their
diff --git a/protobuf-kafkaconnect-converter/pom.xml b/protobuf-kafkaconnect-converter/pom.xml
index 911ef558..a580b1b4 100644
--- a/protobuf-kafkaconnect-converter/pom.xml
+++ b/protobuf-kafkaconnect-converter/pom.xml
@@ -22,7 +22,7 @@
     <parent>
         <groupId>software.amazon.glue</groupId>
         <artifactId>schema-registry-parent</artifactId>
-        <version>1.1.20</version>
+        <version>1.1.21</version>
         <relativePath>../pom.xml</relativePath>
     </parent>
 
diff --git a/serializer-deserializer-msk-iam/pom.xml b/serializer-deserializer-msk-iam/pom.xml
index bc96ba7f..1b1cf532 100644
--- a/serializer-deserializer-msk-iam/pom.xml
+++ b/serializer-deserializer-msk-iam/pom.xml
@@ -33,7 +33,7 @@
     <parent>
         <groupId>software.amazon.glue</groupId>
         <artifactId>schema-registry-parent</artifactId>
-        <version>1.1.20</version>
+        <version>1.1.21</version>
         <relativePath>../pom.xml</relativePath>
     </parent>
 
diff --git a/serializer-deserializer/pom.xml b/serializer-deserializer/pom.xml
index c4b9f4aa..7d678a60 100644
--- a/serializer-deserializer/pom.xml
+++ b/serializer-deserializer/pom.xml
@@ -32,7 +32,7 @@
     <parent>
         <groupId>software.amazon.glue</groupId>
         <artifactId>schema-registry-parent</artifactId>
-        <version>1.1.20</version>
+        <version>1.1.21</version>
         <relativePath>../pom.xml</relativePath>
     </parent>