diff --git a/Dockerfile b/Dockerfile
index 0462e7d8f5f..4095dd0a9a8 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -13,7 +13,7 @@ RUN apk add --no-cache bash \
 	tini
 
 # install cosign
-COPY --from=gcr.io/projectsigstore/cosign:v1.10.0@sha256:a719237925984033fb72685c1998d922c903bbe62464f6d401b5108d3195bb94 /ko-app/cosign /usr/local/bin/cosign
+COPY --from=gcr.io/projectsigstore/cosign:v1.11.1@sha256:f9fd5a287a67f4b955d08062a966df10f9a600b6b8583fd367bce3f1f000a429 /ko-app/cosign /usr/local/bin/cosign
 
 ENTRYPOINT ["/sbin/tini", "--", "/entrypoint.sh"]
 CMD [ "-h" ]