diff --git a/Makefile b/Makefile
index 6c2167ec..a01eadd5 100644
--- a/Makefile
+++ b/Makefile
@@ -2,7 +2,7 @@
 IMG ?= fluxcd/kustomize-controller:latest
 # Produce CRDs that work back to Kubernetes 1.16
 CRD_OPTIONS ?= crd:crdVersions=v1
-SOURCE_VER ?= v0.20.1
+SOURCE_VER ?= v0.21.1
 
 # Get the currently used golang install path (in GOPATH/bin, unless GOBIN is set)
 ifeq (,$(shell go env GOBIN))
diff --git a/config/default/kustomization.yaml b/config/default/kustomization.yaml
index 8fb77069..e365a628 100644
--- a/config/default/kustomization.yaml
+++ b/config/default/kustomization.yaml
@@ -2,8 +2,8 @@ apiVersion: kustomize.config.k8s.io/v1beta1
 kind: Kustomization
 namespace: kustomize-system
 resources:
-- https://github.com/fluxcd/source-controller/releases/download/v0.20.1/source-controller.crds.yaml
-- https://github.com/fluxcd/source-controller/releases/download/v0.20.1/source-controller.deployment.yaml
+- https://github.com/fluxcd/source-controller/releases/download/v0.21.1/source-controller.crds.yaml
+- https://github.com/fluxcd/source-controller/releases/download/v0.21.1/source-controller.deployment.yaml
 - ../crd
 - ../rbac
 - ../manager
diff --git a/go.mod b/go.mod
index 7f574f4d..5c413da1 100644
--- a/go.mod
+++ b/go.mod
@@ -17,7 +17,7 @@ require (
 	github.com/fluxcd/pkg/ssa v0.12.0
 	github.com/fluxcd/pkg/testserver v0.2.0
 	github.com/fluxcd/pkg/untar v0.1.0
-	github.com/fluxcd/source-controller/api v0.20.1
+	github.com/fluxcd/source-controller/api v0.21.1
 	github.com/hashicorp/go-retryablehttp v0.7.0
 	github.com/hashicorp/vault/api v1.3.0
 	github.com/onsi/gomega v1.17.0
diff --git a/go.sum b/go.sum
index 23ee5fc1..9c065e55 100644
--- a/go.sum
+++ b/go.sum
@@ -255,16 +255,14 @@ github.com/fluxcd/pkg/apis/meta v0.10.2 h1:pnDBBEvfs4HaKiVAYgz+e/AQ8dLvcgmVfSeBr
 github.com/fluxcd/pkg/apis/meta v0.10.2/go.mod h1:KQ2er9xa6koy7uoPMZjIjNudB5p4tXs+w0GO6fRcy7I=
 github.com/fluxcd/pkg/runtime v0.12.4 h1:gA27RG/+adN2/7Qe03PB46Iwmye/MusPCpuS4zQ2fW0=
 github.com/fluxcd/pkg/runtime v0.12.4/go.mod h1:gspNvhAqodZgSmK1ZhMtvARBf/NGAlxmaZaIOHkJYsc=
-github.com/fluxcd/pkg/ssa v0.11.1 h1:iZMMe6Pdgt/sv3pZPJ5y4oRDa+8IXHbpPYgpjEmaq/8=
-github.com/fluxcd/pkg/ssa v0.11.1/go.mod h1:S+qig7BTOxop0c134y8Yv8/iQST4Kt7S2xXiFkP4VMA=
 github.com/fluxcd/pkg/ssa v0.12.0 h1:7nF4UigU9Zk/9P/nbzUP3ah8IRC+BpB64O9iu5VnvEo=
 github.com/fluxcd/pkg/ssa v0.12.0/go.mod h1:S+qig7BTOxop0c134y8Yv8/iQST4Kt7S2xXiFkP4VMA=
 github.com/fluxcd/pkg/testserver v0.2.0 h1:Mj0TapmKaywI6Fi5wvt1LAZpakUHmtzWQpJNKQ0Krt4=
 github.com/fluxcd/pkg/testserver v0.2.0/go.mod h1:bgjjydkXsZTeFzjz9Cr4heGANr41uTB1Aj1Q5qzuYVk=
 github.com/fluxcd/pkg/untar v0.1.0 h1:k97V/xV5hFrAkIkVPuv5AVhyxh1ZzzAKba/lbDfGo6o=
 github.com/fluxcd/pkg/untar v0.1.0/go.mod h1:aGswNyzB1mlz/T/kpOS58mITBMxMKc9tlJBH037A2HY=
-github.com/fluxcd/source-controller/api v0.20.1 h1:BfYw1gNHykiCVFNtDz3atcf3Vph+arfuveKmouI98wE=
-github.com/fluxcd/source-controller/api v0.20.1/go.mod h1:Ab2qDmAUz6ZCp8UaHYLYzxyFrC1FQqEqjxiROb/Rdiw=
+github.com/fluxcd/source-controller/api v0.21.1 h1:7X39YQHmB1vmIBrHxU+YAqxwtdC9Zh+tdtMKREW3xiQ=
+github.com/fluxcd/source-controller/api v0.21.1/go.mod h1:Ab2qDmAUz6ZCp8UaHYLYzxyFrC1FQqEqjxiROb/Rdiw=
 github.com/form3tech-oss/jwt-go v3.2.2+incompatible/go.mod h1:pbq4aXjuKjdthFRnoDwaVPLA+WlJuPGy+QneDUgJi2k=
 github.com/form3tech-oss/jwt-go v3.2.3+incompatible/go.mod h1:pbq4aXjuKjdthFRnoDwaVPLA+WlJuPGy+QneDUgJi2k=
 github.com/form3tech-oss/jwt-go v3.2.5+incompatible h1:/l4kBbb4/vGSsdtB5nUe8L7B9mImVMaBPw9L/0TBHU8=