diff --git a/dependencies.Dockerfile b/dependencies.Dockerfile
index c722ce581..9136680ad 100644
--- a/dependencies.Dockerfile
+++ b/dependencies.Dockerfile
@@ -6,7 +6,7 @@
 FROM otel/weaver:v0.26.1@sha256:9094862c0ab261bdbcb079bb981f9a573b3659b130a6d2ab8616eca6ba37aaec AS weaver
 
 # OPA is used to test policies enforced by weaver.
-FROM openpolicyagent/opa:1.20.2@sha256:7b15f9d96345dfa639322ad97f65a0b38260f95efcdd7f5c24e284228708f06c AS opa
+FROM openpolicyagent/opa:1.21.1@sha256:d3a9a6bd4fbcb0f4403294b0d0b239b07be163ac118a46df7d50045b52e52053 AS opa
 
 # Semconv gen is used for backwards compatibility checks.
 # TODO(jsuereth): Remove this when no longer used.