diff --git a/.drone.yml b/.drone.yml
index 8235563..8608147 100644
--- a/.drone.yml
+++ b/.drone.yml
@@ -1,7 +1,7 @@
 env:
 - REPORT_CARD_GITHUB_STATUS_TOKEN=$$report_card_github_status_token
 - REPORT_CARD_GITHUB_REPO_TOKEN=$$report_card_github_repo_token
-image: clever/drone-go:1.5
+image: clever/drone-go:1.6
 notify:
   email:
     recipients:
diff --git a/Makefile b/Makefile
index 02d8ffc..48d0e61 100644
--- a/Makefile
+++ b/Makefile
@@ -14,7 +14,7 @@ GIT_DIRTY=$(test -n "`git status --porcelain`" && echo "+CHANGES" || true)
 TESTS := $(shell find . -name "*_test.go" | sed s/\.go// | grep -v "./vendor")
 BENCHES := $(addsuffix "_bench", $(TESTS))
 .PHONY: test $(PKGS) run clean build-release vendor
-$(eval $(call golang-version-check,1.5))
+$(eval $(call golang-version-check,1.6))
 
 test: $(PKGS)
 $(PKGS): golang-test-all-strict-deps