diff --git a/bigquery/go.mod b/bigquery/go.mod
index f17c071..7847bc9 100644
--- a/bigquery/go.mod
+++ b/bigquery/go.mod
@@ -1,6 +1,6 @@
 module cloud.google.com/go/bigquery
 
-go 1.9
+go 1.11
 
 require (
 	cloud.google.com/go v0.46.3
diff --git a/bigtable/go.mod b/bigtable/go.mod
index 1286c25..f32f00e 100644
--- a/bigtable/go.mod
+++ b/bigtable/go.mod
@@ -1,6 +1,6 @@
 module cloud.google.com/go/bigtable
 
-go 1.9
+go 1.11
 
 require (
 	cloud.google.com/go v0.46.3
diff --git a/datastore/go.mod b/datastore/go.mod
index bc5cd13..addf13c 100644
--- a/datastore/go.mod
+++ b/datastore/go.mod
@@ -1,6 +1,6 @@
 module cloud.google.com/go/datastore
 
-go 1.9
+go 1.11
 
 require (
 	cloud.google.com/go v0.46.3
diff --git a/firestore/go.mod b/firestore/go.mod
index beaac12..3cc006a 100644
--- a/firestore/go.mod
+++ b/firestore/go.mod
@@ -1,6 +1,6 @@
 module cloud.google.com/go/firestore
 
-go 1.9
+go 1.11
 
 require (
 	cloud.google.com/go v0.46.3
diff --git a/go.mod b/go.mod
index c7c93bc..34e77f8 100644
--- a/go.mod
+++ b/go.mod
@@ -1,6 +1,6 @@
 module cloud.google.com/go
 
-go 1.9
+go 1.11
 
 require (
 	cloud.google.com/go/bigquery v1.0.1
diff --git a/internal/kokoro/vet.sh b/internal/kokoro/vet.sh
index ac9575c..22dcaaa 100755
--- a/internal/kokoro/vet.sh
+++ b/internal/kokoro/vet.sh
@@ -81,7 +81,7 @@
   grep -vE "\.pb\.go:") | \
   tee /dev/stderr | (! read)
 
-staticcheck -go 1.9 ./... 2>&1 | ( \
+staticcheck -go 1.11 ./... 2>&1 | ( \
   grep -v S1007 | \
   grep -v SA1019 | \
   grep -v firestore/internal/doc-snippets.go | \
diff --git a/logging/go.mod b/logging/go.mod
index bf60028..349aa24 100644
--- a/logging/go.mod
+++ b/logging/go.mod
@@ -1,6 +1,6 @@
 module cloud.google.com/go/logging
 
-go 1.9
+go 1.11
 
 require (
 	cloud.google.com/go v0.46.3
diff --git a/pubsub/go.mod b/pubsub/go.mod
index 6c0d46c..3d1f83c 100644
--- a/pubsub/go.mod
+++ b/pubsub/go.mod
@@ -1,6 +1,6 @@
 module cloud.google.com/go/pubsub
 
-go 1.9
+go 1.11
 
 require (
 	cloud.google.com/go v0.46.3
diff --git a/spanner/go.mod b/spanner/go.mod
index 6396aad..8f18793 100644
--- a/spanner/go.mod
+++ b/spanner/go.mod
@@ -1,6 +1,6 @@
 module cloud.google.com/go/spanner
 
-go 1.9
+go 1.11
 
 require (
 	cloud.google.com/go v0.46.3
diff --git a/storage/go.mod b/storage/go.mod
index 03e90c7..82cbfee 100644
--- a/storage/go.mod
+++ b/storage/go.mod
@@ -1,6 +1,6 @@
 module cloud.google.com/go/storage
 
-go 1.9
+go 1.11
 
 require (
 	cloud.google.com/go v0.46.3