diff --git a/.github/workflows/cross-darwin.yml b/.github/workflows/cross-darwin.yml
index 9f5575fc7340c..dad435eb9a469 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 618399e8502ed..978d57ac7aae1 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 23d1d8076309c..7504c9c89dd78 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 6e94180cd2343..928ce596c267e 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 4373a25be5d97..2e67547219ebb 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 b268f6bf32a19..b89ce68c86f0d 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 bfaa4d5bc1704..3ffb942f76aee 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 52d56730d4055..403911cd1a8c0 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 f6a3b875fe334..f4af401f1e48e 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