diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index e6ddeb7..5baa09b 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -17,7 +17,7 @@ jobs:
     strategy:
       matrix:
         os: [ ubuntu-latest, macos-latest, windows-latest ]
-        go: [ '1.15', 'stable', 'oldstable' ]
+        go: [ 'stable', 'oldstable' ]
 
     runs-on: ${{ matrix.os }}
     steps:
@@ -42,17 +42,7 @@ jobs:
       run: |
         go mod verify
 
-    - name: Test Go 1.15
-      # This step if needed because -shuffle not available on Go 1.15.
-      # Tests are failing on MacOS. So, we just disable it.
-      if: >-
-        matrix.go == '1.15' && matrix.os != 'macos-latest'
-      run: |
-        go test -v -race -cover ./...
-
     - name: Test
-      if: >-
-        matrix.go != '1.15'
       run: |
         go test -v -race -shuffle=on -cover ./...
 
diff --git a/go.mod b/go.mod
index 146c70d..1ff8aa5 100644
--- a/go.mod
+++ b/go.mod
@@ -1,6 +1,6 @@
 module github.com/gobwas/ws
 
-go 1.15
+go 1.16
 
 require (
 	github.com/gobwas/httphead v0.1.0
diff --git a/go.sum b/go.sum
index 744c946..4d8ed8f 100644
--- a/go.sum
+++ b/go.sum
@@ -2,7 +2,5 @@ github.com/gobwas/httphead v0.1.0 h1:exrUm0f4YX0L7EBwZHuCF4GDp8aJfVeBrlLQrs6NqWU
 github.com/gobwas/httphead v0.1.0/go.mod h1:O/RXo79gxV8G+RqlR/otEwx4Q36zl9rqC5u12GKvMCM=
 github.com/gobwas/pool v0.2.1 h1:xfeeEhW7pwmX8nuLVlqbzVc7udMDrwetjEv+TZIz1og=
 github.com/gobwas/pool v0.2.1/go.mod h1:q8bcK0KcYlCgd9e7WYLm9LpyS+YeLd8JVDW6WezmKEw=
-golang.org/x/sys v0.0.0-20201207223542-d4d67f95c62d h1:MiWWjyhUzZ+jvhZvloX6ZrUsdEghn8a64Upd8EMHglE=
-golang.org/x/sys v0.0.0-20201207223542-d4d67f95c62d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.6.0 h1:MVltZSvRTcU2ljQOhs94SXPftV6DCNnZViHeQps87pQ=
 golang.org/x/sys v0.6.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=