diff --git a/.gitignore b/.gitignore
index c1af1fc..817676e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -14,7 +14,6 @@
 # Dependency directories (remove the comment below to include it)
 exhaust/
 /.idea/.gitignore
-/go.sum
 /.idea/misc.xml
 /.idea/modules.xml
 /.idea/vcs.xml
diff --git a/.travis.yml b/.travis.yml
index 86a8742..793d8fe 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -2,6 +2,7 @@ language: go
 
 go:
   - 1.15.4
+  - 1.16.x
 
 env: GO111MODULE=on
 arch:
diff --git a/go.sum b/go.sum
new file mode 100644
index 0000000..4f862f3
--- /dev/null
+++ b/go.sum
@@ -0,0 +1,38 @@
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