diff --git a/README.md b/README.md
index 49636079..0c966fac 100644
--- a/README.md
+++ b/README.md
@@ -8,7 +8,7 @@ Currently user facing Cassandra cluster objects are created as [Kubernetes Custo
 
 ### Cassandra version support
 
-We are currently building images for Cassandra 3.11.8 and 4.0-beta2. 
+We are currently building images for Cassandra 3.11.9 and 4.0-beta3. 
 
 ## Documentation
 
diff --git a/buildenv/build-all b/buildenv/build-all
index 1936a33d..7bfe6e48 100755
--- a/buildenv/build-all
+++ b/buildenv/build-all
@@ -13,8 +13,8 @@ make
 function release_dev() {
   docker tag cassandra-operator:latest "${REGISTRY}/cassandra-operator:latest-dev"
   docker tag instaclustr-icarus:latest "${REGISTRY}/instaclustr-icarus:latest-dev"
-  docker tag cassandra-3.11.8:latest "${REGISTRY}/cassandra-3.11.8:latest-dev"
-  docker tag cassandra-4.0-beta2:latest "${REGISTRY}/cassandra-4.0-beta2:latest-dev"
+  docker tag cassandra-3.11.9:latest "${REGISTRY}/cassandra-3.11.9:latest-dev"
+  docker tag cassandra-4.0-beta3:latest "${REGISTRY}/cassandra-4.0-beta3:latest-dev"
 }
 
 function release_prod() {
@@ -22,10 +22,10 @@ function release_prod() {
   docker tag cassandra-operator:latest "${REGISTRY}/cassandra-operator:latest"
   docker tag instaclustr-icarus:latest "${REGISTRY}/instaclustr-icarus:${TAG}"
   docker tag instaclustr-icarus:latest "${REGISTRY}/instaclustr-icarus:latest"
-  docker tag cassandra-3.11.8:latest "${REGISTRY}/cassandra-3.11.8:${TAG}"
-  docker tag cassandra-3.11.8:latest "${REGISTRY}/cassandra-3.11.8:latest"
-  docker tag cassandra-4.0-beta2:latest "${REGISTRY}/cassandra-4.0-beta2:${TAG}"
-  docker tag cassandra-4.0-beta2:latest "${REGISTRY}/cassandra-4.0-beta2:latest"
+  docker tag cassandra-3.11.9:latest "${REGISTRY}/cassandra-3.11.9:${TAG}"
+  docker tag cassandra-3.11.9:latest "${REGISTRY}/cassandra-3.11.9:latest"
+  docker tag cassandra-4.0-beta3:latest "${REGISTRY}/cassandra-4.0-beta3:${TAG}"
+  docker tag cassandra-4.0-beta3:latest "${REGISTRY}/cassandra-4.0-beta3:latest"
 }
 
 if [ "${1}" = "dev" ]; then
diff --git a/buildenv/release-all b/buildenv/release-all
index d72f7db1..91149955 100755
--- a/buildenv/release-all
+++ b/buildenv/release-all
@@ -17,10 +17,10 @@ function release_prod() {
     docker push "${REGISTRY}/cassandra-operator:latest"
     docker push "${REGISTRY}/instaclustr-icarus:${TAG}"
     docker push "${REGISTRY}/instaclustr-icarus:latest"
-    docker push "${REGISTRY}/cassandra-3.11.8:latest"
-    docker push "${REGISTRY}/cassandra-3.11.8:${TAG}"
-    docker push "${REGISTRY}/cassandra-4.0-beta2:latest"
-    docker push "${REGISTRY}/cassandra-4.0-beta2:${TAG}"
+    docker push "${REGISTRY}/cassandra-3.11.9:latest"
+    docker push "${REGISTRY}/cassandra-3.11.9:${TAG}"
+    docker push "${REGISTRY}/cassandra-4.0-beta3:latest"
+    docker push "${REGISTRY}/cassandra-4.0-beta3:${TAG}"
   fi
 }
 
@@ -66,8 +66,8 @@ function release_helm() {
 function release_dev() {
   docker push "${REGISTRY}/cassandra-operator:latest-dev"
   docker push "${REGISTRY}/instaclustr-icarus:latest-dev"
-  docker push "${REGISTRY}/cassandra-3.11.8:latest-dev"
-  docker push "${REGISTRY}/cassandra-4.0-beta2:latest-dev"
+  docker push "${REGISTRY}/cassandra-3.11.9:latest-dev"
+  docker push "${REGISTRY}/cassandra-4.0-beta3:latest-dev"
 }
 
 trap defer EXIT
diff --git a/docker/cassandra/Dockerfile b/docker/cassandra/Dockerfile
index 1c6cd40e..5a101525 100644
--- a/docker/cassandra/Dockerfile
+++ b/docker/cassandra/Dockerfile
@@ -3,7 +3,7 @@ ARG openjre_image
 FROM ${openjre_image}
 
 ARG cassandra_major_version=3
-ARG cassandra_version=3.11.8
+ARG cassandra_version=3.11.9
 ARG cassandra_exporter_version=0.9.10
 ARG apache_mirror_url=https://dl.bintray.com/apache/cassandra/pool/main/c/cassandra
 ARG install_cassandra_exporter=true
diff --git a/docker/cassandra/Makefile b/docker/cassandra/Makefile
index f3fd1f85..e7de606d 100644
--- a/docker/cassandra/Makefile
+++ b/docker/cassandra/Makefile
@@ -1,10 +1,10 @@
 CASSANDRA_3_OPENJRE_IMAGE := $(if $(OPENJRE_IMAGE),$(OPENJRE_IMAGE),"base-openjre:stretch-8u252-b09-1-deb9u1")
-CASSANDRA_3_VERSION := $(if $(CASSANDRA_VERSION),$(CASSANDRA_VERSION),"3.11.8")
-CASSANDRA_3_VERSION_IMAGE_TAG := $(if $(CASSANDRA_VERSION),$(subst ~,-,$(CASSANDRA_VERSION)),"3.11.8")
+CASSANDRA_3_VERSION := $(if $(CASSANDRA_VERSION),$(CASSANDRA_VERSION),"3.11.9")
+CASSANDRA_3_VERSION_IMAGE_TAG := $(if $(CASSANDRA_VERSION),$(subst ~,-,$(CASSANDRA_VERSION)),"3.11.9")
 
 CASSANDRA_4_OPENJRE_IMAGE := $(if $(CASSANDRA_4_OPENJRE_IMAGE),$(CASSANDRA_4_OPENJRE_IMAGE),"base-openjre:buster-11.0.8-10-1-deb10u1")
-CASSANDRA_4_VERSION=$(if $(CASSANDRA_VERSION),$(CASSANDRA_VERSION),"4.0~beta2")
-CASSANDRA_4_VERSION_IMAGE_TAG := $(if $(CASSANDRA_4_VERSION),$(subst ~,-,$(CASSANDRA_4_VERSION)),"4.0~beta2")
+CASSANDRA_4_VERSION=$(if $(CASSANDRA_VERSION),$(CASSANDRA_VERSION),"4.0~beta3")
+CASSANDRA_4_VERSION_IMAGE_TAG := $(if $(CASSANDRA_4_VERSION),$(subst ~,-,$(CASSANDRA_4_VERSION)),"4.0~beta3")
 
 CASSANDRA_EXPORTER_VERSION := $(if $(CASSANDRA_EXPORTER_VERSION),$(CASSANDRA_EXPORTER_VERSION),"0.9.10")
 CASSANDRA_K8S_ADDONS_VERSION := $(if $(CASSANDRA_K8S_ADDONS_VERSION),$(CASSANDRA_K8S_ADDONS_VERSION),"1.0.2")
diff --git a/examples/default-values-config.yaml b/examples/default-values-config.yaml
index 3773bc12..a39dbeb7 100644
--- a/examples/default-values-config.yaml
+++ b/examples/default-values-config.yaml
@@ -4,7 +4,7 @@ metadata:
   name: cassandra-operator-default-config
 data:
   nodes: "3"
-  cassandraImage: gcr.io/cassandra-operator/cassandra-3.11.8:latest
+  cassandraImage: gcr.io/cassandra-operator/cassandra-3.11.9:latest
   sidecarImage: gcr.io/cassandra-operator/instaclustr-icarus:latest
   memory: 1Gi
   disk: 1Gi
diff --git a/helm/cassandra/values.yaml b/helm/cassandra/values.yaml
index b7ad8512..544edc34 100644
--- a/helm/cassandra/values.yaml
+++ b/helm/cassandra/values.yaml
@@ -10,7 +10,7 @@ datacenter: dc1
 cluster: test-cluster
 
 image:
-  cassandraRepository: gcr.io/cassandra-operator/cassandra-3.11.8
+  cassandraRepository: gcr.io/cassandra-operator/cassandra-3.11.9
   sidecarRepository: gcr.io/cassandra-operator/instaclustr-icarus
   cassandraTag: latest
   sidecarTag: latest
diff --git a/java/cassandra-3-k8s-addons/pom.xml b/java/cassandra-3-k8s-addons/pom.xml
index 2e3aa7d8..133f7066 100644
--- a/java/cassandra-3-k8s-addons/pom.xml
+++ b/java/cassandra-3-k8s-addons/pom.xml
@@ -11,7 +11,7 @@
 
   <properties>
     <cassandra.k8s.addons.version>1.0.2</cassandra.k8s.addons.version>
-    <cassandra.version>3.11.8</cassandra.version>
+    <cassandra.version>3.11.9</cassandra.version>
 
     <maven.compiler.source>1.8</maven.compiler.source>
     <maven.compiler.target>1.8</maven.compiler.target>
diff --git a/java/cassandra-4-k8s-addons/pom.xml b/java/cassandra-4-k8s-addons/pom.xml
index 9299cc00..f171396f 100644
--- a/java/cassandra-4-k8s-addons/pom.xml
+++ b/java/cassandra-4-k8s-addons/pom.xml
@@ -11,7 +11,7 @@
 
   <properties>
     <cassandra.k8s.addons.version>1.0.2</cassandra.k8s.addons.version>
-    <cassandra.version>4.0-beta2</cassandra.version>
+    <cassandra.version>4.0-beta3</cassandra.version>
 
     <maven.compiler.source>1.8</maven.compiler.source>
     <maven.compiler.target>1.8</maven.compiler.target>
diff --git a/test/cassandra-cluster-deployment-test.sh b/test/cassandra-cluster-deployment-test.sh
index d3fd7ab9..b73f9c84 100755
--- a/test/cassandra-cluster-deployment-test.sh
+++ b/test/cassandra-cluster-deployment-test.sh
@@ -7,7 +7,7 @@ docker images
 helm install \
   cassandra \
   $SCRIPT_DIR/../helm/cassandra \
-  --set image.cassandraRepository=gcr.io/cassandra-operator/cassandra-4.0-beta2 \
+  --set image.cassandraRepository=gcr.io/cassandra-operator/cassandra-4.0-beta3 \
   --set image.cassandraTag=latest-dev \
   --set image.sidecarRepository=gcr.io/cassandra-operator/instaclustr-icarus \
   --set image.sidecarTag=latest-dev \