diff --git a/go.mod b/go.mod
index 33ac1ac3f..52bf48ff7 100644
--- a/go.mod
+++ b/go.mod
@@ -1,6 +1,6 @@
 module github.com/prymitive/karma
 
-go 1.18
+go 1.19
 
 require (
 	github.com/Masterminds/semver/v3 v3.1.1
diff --git a/tools/benchstat/go.mod b/tools/benchstat/go.mod
index d920c0879..e3e6b3cf7 100644
--- a/tools/benchstat/go.mod
+++ b/tools/benchstat/go.mod
@@ -1,5 +1,5 @@
 module _
 
-go 1.18
+go 1.19
 
 require golang.org/x/perf v0.0.0-20220722155240-3d85ee92886d
diff --git a/tools/gofumpt/go.mod b/tools/gofumpt/go.mod
index 54c308054..ae85c9ac7 100644
--- a/tools/gofumpt/go.mod
+++ b/tools/gofumpt/go.mod
@@ -1,6 +1,6 @@
 module _
 
-go 1.18
+go 1.19
 
 require mvdan.cc/gofumpt v0.3.1
 
diff --git a/tools/goimports/go.mod b/tools/goimports/go.mod
index 539592d81..a1f745fac 100644
--- a/tools/goimports/go.mod
+++ b/tools/goimports/go.mod
@@ -1,6 +1,6 @@
 module _
 
-go 1.18
+go 1.19
 
 require golang.org/x/tools v0.1.12
 
diff --git a/tools/golangci-lint/go.mod b/tools/golangci-lint/go.mod
index d9107a88c..34cbb8d6c 100644
--- a/tools/golangci-lint/go.mod
+++ b/tools/golangci-lint/go.mod
@@ -1,6 +1,6 @@
 module _
 
-go 1.18
+go 1.19
 
 require github.com/golangci/golangci-lint v1.47.3
 
diff --git a/tools/looppointer/go.mod b/tools/looppointer/go.mod
index b684b0521..b9305944e 100644
--- a/tools/looppointer/go.mod
+++ b/tools/looppointer/go.mod
@@ -1,6 +1,6 @@
 module _
 
-go 1.18
+go 1.19
 
 require github.com/kyoh86/looppointer v0.1.8-0.20220224024524-f953a93c424a