diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 73ff688..f0e6a0a 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -16,7 +16,7 @@ jobs:
   test:
     strategy:
       matrix:
-        go-version: [stable, oldstable]
+        go-version: [stable, oldstable, "1.13"]
         platform: [ubuntu-latest]
         include:
           # only update test coverage stats with most recent go version on linux
diff --git a/go.mod b/go.mod
index 2ad8472..9e80160 100644
--- a/go.mod
+++ b/go.mod
@@ -1,5 +1,5 @@
 module github.com/google/go-querystring
 
-go 1.10
+go 1.13
 
 require github.com/google/go-cmp v0.6.0