diff --git a/.drone.yml b/.drone.yml
index 76221d2..0e4b953 100644
--- a/.drone.yml
+++ b/.drone.yml
@@ -13,7 +13,7 @@ workspace:
 steps:
 - name: build
   pull: always
-  image: golang:1.13
+  image: golang:1.15
   environment:
       GOPROXY: https://goproxy.cn
   commands:
@@ -32,7 +32,7 @@ steps:
 
 - name: unit-test
   pull: always
-  image: golang:1.13
+  image: golang:1.15
   commands:
   - make unit-test-coverage
   settings:
@@ -46,7 +46,7 @@ steps:
 
 - name: release-test
   pull: always
-  image: golang:1.13
+  image: golang:1.15
   commands:
   - make test
   settings:
@@ -60,7 +60,7 @@ steps:
 
 - name: tag-test
   pull: always
-  image: golang:1.13
+  image: golang:1.15
   commands:
   - make test
   settings:
diff --git a/README.md b/README.md
index de08184..f8f2fc1 100644
--- a/README.md
+++ b/README.md
@@ -14,7 +14,7 @@ It uses [code.gitea.io/sdk](https://code.gitea.io/sdk) and interacts with the Gi
 You can use the prebuilt binaries from [dl.gitea.io](https://dl.gitea.io/tea/)
 
 
-To install from source, go 1.12 or newer is required:
+To install from source, go 1.13 or newer is required:
 ```sh
 go get code.gitea.io/tea
 go install code.gitea.io/tea