diff --git a/examples/ext_authz/Dockerfile-opa b/examples/ext_authz/Dockerfile-opa
index abcc30a97573f..d40e0050f358f 100644
--- a/examples/ext_authz/Dockerfile-opa
+++ b/examples/ext_authz/Dockerfile-opa
@@ -1 +1 @@
-FROM openpolicyagent/opa:0.47.4-istio@sha256:6bc3c651ade7df5aea1826aaa2d7ccb026a50982ca13c547787f50c55b462c04
+FROM openpolicyagent/opa:0.51.0-istio@sha256:fb677a040a7d12f0ff4dea9025204068b7723c81d5d6bb2f5bc25db97e0b4d0c