diff --git a/.github/actions/fsat-setup/action.yaml b/.github/actions/fsat-setup/action.yaml
index 854615f9..97469e9c 100644
--- a/.github/actions/fsat-setup/action.yaml
+++ b/.github/actions/fsat-setup/action.yaml
@@ -12,10 +12,10 @@ inputs:
     default: v0.50.15
   fabric-version:
     description: Version of Hyperledger Fabric
-    default: "2.5.15"
+    default: "2.5.16"
   ca-version:
     description: Version of Hyperledger Fabric CA
-    default: "1.5.15"
+    default: "1.5.21"
 
 runs:
   using: "composite"
diff --git a/.github/actions/test-network-setup/action.yaml b/.github/actions/test-network-setup/action.yaml
index 9cdca2aa..084d11b2 100644
--- a/.github/actions/test-network-setup/action.yaml
+++ b/.github/actions/test-network-setup/action.yaml
@@ -12,10 +12,10 @@ inputs:
     default: 25.x
   fabric-version:
     description: Version of Hyperledger Fabric
-    default: 2.5.15
+    default: 2.5.16
   ca-version:
     description: Version of Hyperledger Fabric CA
-    default: 1.5.15
+    default: 1.5.21
 
 runs:
   using: "composite"
diff --git a/.github/workflows/test-network-bft-orderer.yaml b/.github/workflows/test-network-bft-orderer.yaml
index e8b689dd..fa8879f9 100644
--- a/.github/workflows/test-network-bft-orderer.yaml
+++ b/.github/workflows/test-network-bft-orderer.yaml
@@ -38,7 +38,7 @@ jobs:
         # Note: The default Fabric version for CI is currently the latest LTS (v2.5.x).
         # To test BFT Orderers, Fabric v3.x is explicitly specified here.
         with:
-          fabric-version: 3.1.4
+          fabric-version: 3.1.5
 
       - name: Run Test Network with BFT Orderers
         working-directory: test-network
diff --git a/full-stack-asset-transfer-guide/infrastructure/multipass-cloud-config.yaml b/full-stack-asset-transfer-guide/infrastructure/multipass-cloud-config.yaml
index 40044790..1ce7775d 100644
--- a/full-stack-asset-transfer-guide/infrastructure/multipass-cloud-config.yaml
+++ b/full-stack-asset-transfer-guide/infrastructure/multipass-cloud-config.yaml
@@ -27,7 +27,7 @@ write_files:
       # set -o pipefail
 
       if [ -z $1 ]; then
-        HLF_VERSION=2.5.15
+        HLF_VERSION=2.5.16
       else
         HLF_VERSION=$1
       fi
diff --git a/full-stack-asset-transfer-guide/infrastructure/sample-network/network b/full-stack-asset-transfer-guide/infrastructure/sample-network/network
index 2fa66d98..f717c2ac 100755
--- a/full-stack-asset-transfer-guide/infrastructure/sample-network/network
+++ b/full-stack-asset-transfer-guide/infrastructure/sample-network/network
@@ -33,8 +33,8 @@ function context() {
   export ${name}="${!override_name:-${default_value}}"
 }
 
-context FABRIC_VERSION            2.5.15
-context FABRIC_CA_VERSION         1.5.15
+context FABRIC_VERSION            2.5.16
+context FABRIC_CA_VERSION         1.5.21
 
 context CLUSTER_RUNTIME           kind                  # or k3s for Rancher
 context CONTAINER_CLI             docker                # or nerdctl for containerd
diff --git a/full-stack-asset-transfer-guide/infrastructure/sample-network/scripts/rest_sample.sh b/full-stack-asset-transfer-guide/infrastructure/sample-network/scripts/rest_sample.sh
index c18b6cc6..99b069d4 100644
--- a/full-stack-asset-transfer-guide/infrastructure/sample-network/scripts/rest_sample.sh
+++ b/full-stack-asset-transfer-guide/infrastructure/sample-network/scripts/rest_sample.sh
@@ -21,12 +21,12 @@ fabric-ca-client  register \
   --id.name       $USERNAME \
   --id.secret     $PASSWORD \
   --id.type       client \
-  --url           https://$WORKSHOP_NAMESPACE-$ORG-ca-ca.$WORKSHOP_INGRESS_DOMAIN \
+  --url           https://$WORKSHOP_NAMESPACE-$ORG-ca-ca.$WORKSHOP_INGRESS_DOMAIN:443 \
   --tls.certfiles $WORKSHOP_CRYPTO/cas/$ORG-ca/tls-cert.pem \
   --mspdir        $WORKSHOP_CRYPTO/enrollments/$ORG/users/rcaadmin/msp
 
 fabric-ca-client enroll \
-  --url           https://$USERNAME:$PASSWORD@$WORKSHOP_NAMESPACE-$ORG-ca-ca.$WORKSHOP_INGRESS_DOMAIN \
+  --url           https://$USERNAME:$PASSWORD@$WORKSHOP_NAMESPACE-$ORG-ca-ca.$WORKSHOP_INGRESS_DOMAIN:443 \
   --tls.certfiles $WORKSHOP_CRYPTO/cas/$ORG-ca/tls-cert.pem \
   --mspdir        $WORKSHOP_CRYPTO/enrollments/$ORG/users/$USERNAME/msp
 
diff --git a/full-stack-asset-transfer-guide/tests/20-cloud-e2e.sh b/full-stack-asset-transfer-guide/tests/20-cloud-e2e.sh
index 896a1717..8b060d54 100755
--- a/full-stack-asset-transfer-guide/tests/20-cloud-e2e.sh
+++ b/full-stack-asset-transfer-guide/tests/20-cloud-e2e.sh
@@ -332,12 +332,12 @@ fabric-ca-client  register \
   --id.name       $USERNAME \
   --id.secret     $PASSWORD \
   --id.type       client \
-  --url           https://$WORKSHOP_NAMESPACE-$ORG-ca-ca.$WORKSHOP_INGRESS_DOMAIN \
+  --url           https://$WORKSHOP_NAMESPACE-$ORG-ca-ca.$WORKSHOP_INGRESS_DOMAIN:443 \
   --tls.certfiles $WORKSHOP_CRYPTO/cas/$ORG-ca/tls-cert.pem \
   --mspdir        $WORKSHOP_CRYPTO/enrollments/$ORG/users/rcaadmin/msp
 
 fabric-ca-client enroll \
-  --url           https://$USERNAME:$PASSWORD@$WORKSHOP_NAMESPACE-$ORG-ca-ca.$WORKSHOP_INGRESS_DOMAIN \
+  --url           https://$USERNAME:$PASSWORD@$WORKSHOP_NAMESPACE-$ORG-ca-ca.$WORKSHOP_INGRESS_DOMAIN:443 \
   --tls.certfiles $WORKSHOP_CRYPTO/cas/$ORG-ca/tls-cert.pem \
   --mspdir        $WORKSHOP_CRYPTO/enrollments/$ORG/users/$USERNAME/msp
 
diff --git a/test-network-k8s/docs/BFT_ORDERERS.md b/test-network-k8s/docs/BFT_ORDERERS.md
index 1c5ccccc..3f5e5902 100644
--- a/test-network-k8s/docs/BFT_ORDERERS.md
+++ b/test-network-k8s/docs/BFT_ORDERERS.md
@@ -39,8 +39,8 @@ First, run the following command to verify that the environment variables are co
 ```shell
 $ ./network
 
-Fabric image versions: Peer (3.1.4), CA (1.5.15)
-Fabric binary versions: Peer (3.1.4), CA (1.5.15)
+Fabric image versions: Peer (3.1.5), CA (1.5.21)
+Fabric binary versions: Peer (3.1.5), CA (1.5.21)
 
 --- Fabric Information
 Fabric Version          : 3.1
diff --git a/test-network/network.config b/test-network/network.config
index b0867bf8..02b2b162 100644
--- a/test-network/network.config
+++ b/test-network/network.config
@@ -1,7 +1,7 @@
-# default image tag, example: "2.5.13".  "default" will download the latest. (-i)
+# default image tag, example: "2.5.16".  "default" will download the latest. (-i)
 IMAGETAG="default"
 
-# default ca image tag, example: "1.5.15". "default" will download the latest. (-cai)
+# default ca image tag, example: "1.5.21". "default" will download the latest. (-cai)
 CA_IMAGETAG="default"
 
 # Using crpto vs CA. default is cryptogen
diff --git a/test-network/scripts/utils.sh b/test-network/scripts/utils.sh
index e9244f91..26ce78a7 100755
--- a/test-network/scripts/utils.sh
+++ b/test-network/scripts/utils.sh
@@ -17,8 +17,8 @@ function printHelp() {
     println
     println "    Flags:"
     println "    Used with \033[0;32mnetwork.sh prereq\033[0m:"
-    println "    -i     FabricVersion (default: '2.5.15')"
-    println "    -cai   Fabric CA Version (default: '1.5.15')"
+    println "    -i     FabricVersion (default: '2.5.16')"
+    println "    -cai   Fabric CA Version (default: '1.5.21')"
     println
   elif [ "$USAGE" == "up" ]; then
     println "Usage: "
@@ -159,8 +159,8 @@ function printHelp() {
     println
     println "    Flags:"
     println "    Used with \033[0;32mnetwork.sh prereq\033[0m"
-    println "    -i     FabricVersion (default: '2.5.15')"
-    println "    -cai   Fabric CA Version (default: '1.5.15')"
+    println "    -i     FabricVersion (default: '2.5.16')"
+    println "    -cai   Fabric CA Version (default: '1.5.21')"
     println
     println "    Used with \033[0;32mnetwork.sh up\033[0m, \033[0;32mnetwork.sh createChannel\033[0m:"
     println "    -ca - Use Certificate Authorities to generate network crypto material"