diff --git a/.github/workflows/cross-darwin.yml b/.github/workflows/cross-darwin.yml
index 9f5575fc7..dad435eb9 100644
--- a/.github/workflows/cross-darwin.yml
+++ b/.github/workflows/cross-darwin.yml
@@ -16,10 +16,10 @@ jobs:
 
     steps:
 
-    - name: Set up Go 1.14
+    - name: Set up Go 1.13
       uses: actions/setup-go@v1
       with:
-        go-version: 1.14
+        go-version: 1.13
       id: go
 
     - name: Check out code into the Go module directory
diff --git a/.github/workflows/cross-freebsd.yml b/.github/workflows/cross-freebsd.yml
index 618399e85..978d57ac7 100644
--- a/.github/workflows/cross-freebsd.yml
+++ b/.github/workflows/cross-freebsd.yml
@@ -16,10 +16,10 @@ jobs:
 
     steps:
 
-    - name: Set up Go 1.14
+    - name: Set up Go 1.13
       uses: actions/setup-go@v1
       with:
-        go-version: 1.14
+        go-version: 1.13
       id: go
 
     - name: Check out code into the Go module directory
diff --git a/.github/workflows/cross-openbsd.yml b/.github/workflows/cross-openbsd.yml
index 23d1d8076..7504c9c89 100644
--- a/.github/workflows/cross-openbsd.yml
+++ b/.github/workflows/cross-openbsd.yml
@@ -16,10 +16,10 @@ jobs:
 
     steps:
 
-    - name: Set up Go 1.14
+    - name: Set up Go 1.13
       uses: actions/setup-go@v1
       with:
-        go-version: 1.14
+        go-version: 1.13
       id: go
 
     - name: Check out code into the Go module directory
diff --git a/.github/workflows/cross-windows.yml b/.github/workflows/cross-windows.yml
index 6e94180cd..928ce596c 100644
--- a/.github/workflows/cross-windows.yml
+++ b/.github/workflows/cross-windows.yml
@@ -16,10 +16,10 @@ jobs:
 
     steps:
 
-    - name: Set up Go 1.14
+    - name: Set up Go 1.13
       uses: actions/setup-go@v1
       with:
-        go-version: 1.14
+        go-version: 1.13
       id: go
 
     - name: Check out code into the Go module directory
diff --git a/.github/workflows/linux.yml b/.github/workflows/linux.yml
index 4373a25be..2e6754721 100644
--- a/.github/workflows/linux.yml
+++ b/.github/workflows/linux.yml
@@ -16,10 +16,10 @@ jobs:
 
     steps:
 
-    - name: Set up Go 1.14
+    - name: Set up Go 1.13
       uses: actions/setup-go@v1
       with:
-        go-version: 1.14
+        go-version: 1.13
       id: go
 
     - name: Check out code into the Go module directory
diff --git a/.github/workflows/staticcheck.yml b/.github/workflows/staticcheck.yml
index b268f6bf3..b89ce68c8 100644
--- a/.github/workflows/staticcheck.yml
+++ b/.github/workflows/staticcheck.yml
@@ -13,10 +13,10 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - name: Set up Go 1.14
+    - name: Set up Go 1.13
       uses: actions/setup-go@v1
       with:
-        go-version: 1.14
+        go-version: 1.13
 
     - name: Check out code
       uses: actions/checkout@v1
diff --git a/Dockerfile b/Dockerfile
index bfaa4d5bc..3ffb942f7 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -2,7 +2,7 @@
 # Use of this source code is governed by a BSD-style
 # license that can be found in the LICENSE file.
 
-FROM golang:1.14-alpine AS build-env
+FROM golang:1.13-alpine AS build-env
 
 WORKDIR /go/src/tailscale
 
diff --git a/README.md b/README.md
index 52d56730d..403911cd1 100644
--- a/README.md
+++ b/README.md
@@ -24,7 +24,7 @@ go install tailscale.com/cmd/tailscale{,d}
 ```
 
 We only support the latest Go release and any Go beta or release
-candidate builds (currently Go 1.14 or Go 1.15) in module mode. It
+candidate builds (currently Go 1.13.x or Go 1.14) in module mode. It
 might work in earlier Go versions or in GOPATH mode, but we're making
 no effort to keep those working.
 
diff --git a/go.mod b/go.mod
index f6a3b875f..f4af401f1 100644
--- a/go.mod
+++ b/go.mod
@@ -1,6 +1,6 @@
 module tailscale.com
 
-go 1.14
+go 1.13
 
 require (
 	github.com/anmitsu/go-shlex v0.0.0-20161002113705-648efa622239 // indirect