diff --git a/go.mod b/go.mod
index 748a619b50..57e141b741 100644
--- a/go.mod
+++ b/go.mod
@@ -17,7 +17,7 @@ require (
 	github.com/gorilla/context v1.1.1 // indirect
 	github.com/gorilla/mux v0.0.0-20170217192616-94e7d24fd285 // indirect
 	github.com/gotestyourself/gotestyourself v2.2.0+incompatible // indirect
-	github.com/imdario/mergo v0.3.8
+	github.com/imdario/mergo v0.3.9
 	github.com/klauspost/compress v1.10.3
 	github.com/klauspost/pgzip v1.2.3
 	github.com/konsorten/go-windows-terminal-sequences v1.0.2 // indirect
diff --git a/go.sum b/go.sum
index 6c036a024c..62f4904459 100644
--- a/go.sum
+++ b/go.sum
@@ -80,6 +80,8 @@ github.com/hashicorp/golang-lru v0.5.1 h1:0hERBMJE1eitiLkihrMvRVBYAkpHzc/J3QdDN+
 github.com/hashicorp/golang-lru v0.5.1/go.mod h1:/m3WP610KZHVQ1SGc6re/UDhFvYD7pJ4Ao+sR/qLZy8=
 github.com/imdario/mergo v0.3.8 h1:CGgOkSJeqMRmt0D9XLWExdT4m4F1vd3FV3VPt+0VxkQ=
 github.com/imdario/mergo v0.3.8/go.mod h1:2EnlNZ0deacrJVfApfmtdGgDfMuh/nq6Ok1EcJh5FfA=
+github.com/imdario/mergo v0.3.9 h1:UauaLniWCFHWd+Jp9oCEkTBj8VO/9DKg3PV3VCNMDIg=
+github.com/imdario/mergo v0.3.9/go.mod h1:2EnlNZ0deacrJVfApfmtdGgDfMuh/nq6Ok1EcJh5FfA=
 github.com/kisielk/errcheck v1.1.0/go.mod h1:EZBBE59ingxPouuu3KfxchcWSUPOHkagtvWXihfKN4Q=
 github.com/kisielk/gotool v1.0.0/go.mod h1:XhKaO+MFFWcvkIS/tQcRk01m1F5IRFswLeQ+oQHNcck=
 github.com/klauspost/compress v1.10.2 h1:Znfn6hXZAHaLPNnlqUYRrBSReFHYybslgv4PTiyz6P0=