diff --git a/scripts/delete-istio.sh b/scripts/delete-istio.sh
index 35830fda..466108d0 100755
--- a/scripts/delete-istio.sh
+++ b/scripts/delete-istio.sh
@@ -5,9 +5,9 @@ SCRIPT_DIR=$(dirname "$0")
 
 # shellcheck disable=SC1091 # Not following.
 source "$SCRIPT_DIR"/init-env.sh
-ISTIO_DIR=istio-1.21.2
+ISTIO_DIR=istio-1.22.3
 if [ ! -d "$ISTIO_DIR" ]; then
-	curl -L https://istio.io/downloadIstio | ISTIO_VERSION=1.21.2 sh -
+	curl -L https://istio.io/downloadIstio | ISTIO_VERSION=1.22.3 sh -
 fi
 ./$ISTIO_DIR/bin/istioctl uninstall -y --purge
 oc label namespace "$CERTSUITE_EXAMPLE_NAMESPACE" istio-injection-
diff --git a/scripts/install-istio.sh b/scripts/install-istio.sh
index 211e8493..8e5826e0 100755
--- a/scripts/install-istio.sh
+++ b/scripts/install-istio.sh
@@ -6,11 +6,11 @@ SCRIPT_DIR=$(dirname "$0")
 # shellcheck disable=SC1091 # File not following.
 source "$SCRIPT_DIR"/init-env.sh
 
-ISTIO_DIR=istio-1.21.2
+ISTIO_DIR=istio-1.22.3
 ISTIO_PROFILE=demo
 
 if [ ! -d "$ISTIO_DIR" ]; then
-	curl -L https://istio.io/downloadIstio | ISTIO_VERSION=1.21.2 sh -
+	curl -L https://istio.io/downloadIstio | ISTIO_VERSION=1.22.3 sh -
 fi
 oc create namespace istio-system
 if ! $CERTSUITE_NON_OCP_CLUSTER; then