diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 499451c..e2885fc 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -12,7 +12,7 @@ jobs:
     strategy:
       matrix:
         go-version:
-          - 1.13.x # first version with errors.Is
+          - 1.16.x # first version with retract
           - 1.x    # latest stable version
     steps:
       - name: Checkout
diff --git a/README.md b/README.md
index c32f1c9..5f30730 100644
--- a/README.md
+++ b/README.md
@@ -7,11 +7,9 @@
 - [adcom1](adcom1/) - [AdCOM](https://iabtechlab.com/standards/openmedia/) [1.0](https://github.com/InteractiveAdvertisingBureau/AdCOM) (can lag behind because official spec is constantly updated without version bump, feel free to PR)
 - [native1](native1/) - [OpenRTB Dynamic Native Ads API](https://iabtechlab.com/standards/openrtb-native/) [1.2](https://iabtechlab.com/wp-content/uploads/2016/07/OpenRTB-Native-Ads-Specification-Final-1.2.pdf)
 
-**Requires Go 1.13+**
+**Requires Go 1.16+**
 
-This library uses [Go modules](https://golang.org/ref/mod) ([tl;dr](https://blog.golang.org/using-go-modules)), so it requires Go [1.11](https://golang.org/doc/go1.11)+ since older Go versions are not capable of using versioned paths.
-
-Also, [test/matcher library](https://github.com/onsi/gomega) relies on newer Go [error handling approach](https://blog.golang.org/go1.13-errors), so tests require Go [1.13](https://golang.org/doc/go1.13)+.
+This library uses [Go modules](https://golang.org/ref/mod) ([tl;dr](https://blog.golang.org/using-go-modules)) and requires Go [1.16](https://golang.org/doc/go1.16)+ to enable the ability to issue release retractions.
 
 # Using
 
diff --git a/go.mod b/go.mod
index 2a4addc..8909dfe 100644
--- a/go.mod
+++ b/go.mod
@@ -2,6 +2,8 @@ module github.com/prebid/openrtb/v18
 
 go 1.16
 
+retract v18.0.0 // Published with the wrong module version.
+
 require (
 	github.com/onsi/ginkgo v1.16.1
 	github.com/onsi/gomega v1.11.0