diff --git a/go.mod b/go.mod
index fe66bd2366..94d33e4284 100644
--- a/go.mod
+++ b/go.mod
@@ -4,7 +4,7 @@ go 1.25.11
 
 require (
 	github.com/Masterminds/semver v1.5.0
-	github.com/cert-manager/cert-manager v1.20.2
+	github.com/cert-manager/cert-manager v1.20.3
 	github.com/cli/go-gh/v2 v2.13.0
 	github.com/go-logr/zapr v1.3.0
 	github.com/google/go-cmp v0.7.0
diff --git a/go.sum b/go.sum
index 79c858a406..bcc441b028 100644
--- a/go.sum
+++ b/go.sum
@@ -276,8 +276,8 @@ github.com/cenkalti/backoff/v4 v4.3.0/go.mod h1:Y3VNntkOUPxTVeUxJ/G5vcM//AlwfmyY
 github.com/cenkalti/backoff/v5 v5.0.3 h1:ZN+IMa753KfX5hd8vVaMixjnqRZ3y8CuJKRKj1xcsSM=
 github.com/cenkalti/backoff/v5 v5.0.3/go.mod h1:rkhZdG3JZukswDf7f0cwqPNk4K0sa+F97BxZthm/crw=
 github.com/census-instrumentation/opencensus-proto v0.2.1/go.mod h1:f6KPmirojxKA12rnyqOA5BBL4O983OfeGPqjHWSTneU=
-github.com/cert-manager/cert-manager v1.20.2 h1:CimnY00nLqB2lmxhoSuEC4GDMFDK7JCXqyjwMM9ndIQ=
-github.com/cert-manager/cert-manager v1.20.2/go.mod h1:1g/+a/WK5zWH/dXPZa3dMD3aJQJNRXQu+PN17C6WrOw=
+github.com/cert-manager/cert-manager v1.20.3 h1:7zgThbjfRBNjN2/cM/Wdo/vl/oeFQybIMNzxd1Ocipc=
+github.com/cert-manager/cert-manager v1.20.3/go.mod h1:Aqf5P0xRh9aey1p10m2c3UAk/Vb/FBPyH3WQxJRm+7Y=
 github.com/certifi/gocertifi v0.0.0-20191021191039-0944d244cd40/go.mod h1:sGbDF6GwGcLpkNXPUTkMRoywsNa/ol15pxFe6ERfguA=
 github.com/certifi/gocertifi v0.0.0-20200922220541-2c3bb06c6054/go.mod h1:sGbDF6GwGcLpkNXPUTkMRoywsNa/ol15pxFe6ERfguA=
 github.com/cespare/xxhash v1.1.0/go.mod h1:XrSqR1VqqWfGrhpAt58auRo0WTKS1nRRg3ghfAqPWnc=
diff --git a/vendor/modules.txt b/vendor/modules.txt
index 94ef9c5f50..6a58f330f9 100644
--- a/vendor/modules.txt
+++ b/vendor/modules.txt
@@ -404,7 +404,7 @@ github.com/buildkite/roko
 # github.com/cenkalti/backoff/v5 v5.0.3
 ## explicit; go 1.23
 github.com/cenkalti/backoff/v5
-# github.com/cert-manager/cert-manager v1.20.2
+# github.com/cert-manager/cert-manager v1.20.3
 ## explicit; go 1.25.0
 github.com/cert-manager/cert-manager/pkg/apis/acme
 github.com/cert-manager/cert-manager/pkg/apis/acme/v1