diff --git a/blocker_test.go b/blocker_test.go
index 805efd6..5372809 100644
--- a/blocker_test.go
+++ b/blocker_test.go
@@ -5,7 +5,7 @@ import (
 	"time"
 
 	"aahframework.org/test.v0/assert"
-	"github.com/bouk/monkey"
+	"bou.ke/monkey"
 )
 
 func Test_it_block_as_expected(t *testing.T) {
diff --git a/go.mod b/go.mod
new file mode 100644
index 0000000..08934fa
--- /dev/null
+++ b/go.mod
@@ -0,0 +1,8 @@
+module github.com/ghetzel/ratelimit
+
+go 1.13
+
+require (
+	aahframework.org/test.v0 v0.0.0-20170303192812-d14ae1dc852d
+	bou.ke/monkey v1.0.2
+)
diff --git a/go.sum b/go.sum
new file mode 100644
index 0000000..d96c9e7
--- /dev/null
+++ b/go.sum
@@ -0,0 +1,4 @@
+aahframework.org/test.v0 v0.0.0-20170303192812-d14ae1dc852d h1:xrk269ZdyicxrmDDwLkjpWxzBeApYPKmGlAXtXylB0k=
+aahframework.org/test.v0 v0.0.0-20170303192812-d14ae1dc852d/go.mod h1:Dc0WOMD7SnuzGgAI29bLYayM5XoDr+Iha/jfObqPwhA=
+bou.ke/monkey v1.0.2 h1:kWcnsrCNUatbxncxR/ThdYqbytgOIArtYWqcQLQzKLI=
+bou.ke/monkey v1.0.2/go.mod h1:OqickVX3tNx6t33n1xvtTtu85YN5s6cKwVug+oHMaIA=
diff --git a/rate_limit_test.go b/rate_limit_test.go
index 871930d..dae5228 100644
--- a/rate_limit_test.go
+++ b/rate_limit_test.go
@@ -6,7 +6,7 @@ import (
 	"time"
 
 	"aahframework.org/test.v0/assert"
-	"github.com/bouk/monkey"
+	"bou.ke/monkey"
 )
 
 func Test_IT_PANIC_WHEN_INVALID_NEW_RATE_PATTERN(t *testing.T) {
diff --git a/spammer_test.go b/spammer_test.go
index 7fd4b74..662c5ca 100644
--- a/spammer_test.go
+++ b/spammer_test.go
@@ -5,7 +5,7 @@ import (
 	"time"
 
 	"aahframework.org/test.v0/assert"
-	"github.com/bouk/monkey"
+	"bou.ke/monkey"
 )
 
 func Test_it_count_spam_as_expected(t *testing.T) {