diff --git a/.github/workflows/build.yaml b/.github/workflows/build.yaml
index a647fa5c..b4fded3e 100644
--- a/.github/workflows/build.yaml
+++ b/.github/workflows/build.yaml
@@ -17,7 +17,7 @@ jobs:
     - name: Setup Go
       uses: actions/setup-go@v3
       with:
-        go-version: 1.17.x
+        go-version: 1.18.x
     - name: Restore go cache
       uses: actions/cache@v3
       with:
@@ -41,7 +41,7 @@ jobs:
       - name: Setup Go
         uses: actions/setup-go@v3
         with:
-          go-version: 1.17.x
+          go-version: 1.18.x
       - name: Run tests
         run: make test
         env:
@@ -64,7 +64,7 @@ jobs:
       - name: Setup Go
         uses: actions/setup-go@v3
         with:
-          go-version: 1.17.x
+          go-version: 1.18.x
       - name: Restore Go cache
         uses: actions/cache@v3
         with:
diff --git a/DEVELOPMENT.md b/DEVELOPMENT.md
index f9afa686..9c815933 100644
--- a/DEVELOPMENT.md
+++ b/DEVELOPMENT.md
@@ -97,7 +97,7 @@ If any of the above dependencies are not present on your system, the first invoc
 ## How to run the test suite
 
 Prerequisites:
-* Go >= 1.17
+* Go >= 1.18
 
 You can run the test suite by simply doing
 
diff --git a/Dockerfile b/Dockerfile
index 91e4f1ee..ac25e9b1 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,5 +1,5 @@
 ARG BASE_VARIANT=alpine
-ARG GO_VERSION=1.17
+ARG GO_VERSION=1.18
 ARG XX_VERSION=1.1.0
 
 ARG LIBGIT2_IMG=ghcr.io/fluxcd/golang-with-libgit2
diff --git a/Makefile b/Makefile
index d10a93f8..ae5a8ca8 100644
--- a/Makefile
+++ b/Makefile
@@ -175,8 +175,8 @@ api-docs: gen-crd-api-reference-docs	## Generate API reference documentation
 	$(GEN_CRD_API_REFERENCE_DOCS) -api-dir=./api/v1beta1 -config=./hack/api-docs/config.json -template-dir=./hack/api-docs/template -out-file=./docs/api/image-automation.md
 
 tidy:	## Run go mod tidy
-	cd api; rm -f go.sum; go mod tidy -compat=1.17
-	rm -f go.sum; go mod tidy -compat=1.17
+	cd api; rm -f go.sum; go mod tidy -compat=1.18
+	rm -f go.sum; go mod tidy -compat=1.18
 
 fmt:	## Run go fmt against code
 	go fmt ./...
diff --git a/api/go.mod b/api/go.mod
index ee20d8a3..2363b198 100644
--- a/api/go.mod
+++ b/api/go.mod
@@ -1,6 +1,6 @@
 module github.com/fluxcd/image-automation-controller/api
 
-go 1.17
+go 1.18
 
 require (
 	github.com/fluxcd/pkg/apis/meta v0.14.2
diff --git a/go.mod b/go.mod
index 8ca17198..5e8c3e35 100644
--- a/go.mod
+++ b/go.mod
@@ -1,6 +1,6 @@
 module github.com/fluxcd/image-automation-controller
 
-go 1.17
+go 1.18
 
 replace github.com/fluxcd/image-automation-controller/api => ./api
 
diff --git a/tests/fuzz/go.mod b/tests/fuzz/go.mod
index ac8c73a5..56936047 100644
--- a/tests/fuzz/go.mod
+++ b/tests/fuzz/go.mod
@@ -2,7 +2,7 @@
 // Replaced by oss_fuzz_build.sh.
 module github.com/fluxcd/image-automation-controller/tests/fuzz
 
-go 1.17
+go 1.18
 
 replace (
 	github.com/fluxcd/image-automation-controller/api => ../../api
diff --git a/tests/fuzz/oss_fuzz_build.sh b/tests/fuzz/oss_fuzz_build.sh
index 40deceb3..b04c1f96 100755
--- a/tests/fuzz/oss_fuzz_build.sh
+++ b/tests/fuzz/oss_fuzz_build.sh
@@ -77,7 +77,7 @@ SOURCE_VER=$(go list -m github.com/fluxcd/source-controller/api | awk '{print $2
 REFLECTOR_VER=$(go list -m github.com/fluxcd/image-reflector-controller/api | awk '{print $2}')
 
 go mod download
-go mod tidy -go=1.16 && go mod tidy -go=1.17
+go mod tidy -go=1.18
 go get -d github.com/fluxcd/image-automation-controller
 go get -d github.com/AdaLogics/go-fuzz-headers