diff --git a/go.mod b/go.mod
index 9fa8e0e..7f3e027 100644
--- a/go.mod
+++ b/go.mod
@@ -3,6 +3,7 @@
 require (
 	github.com/hashicorp/golang-lru v0.5.1 // indirect
 	github.com/kisielk/errcheck v1.2.0 // indirect
+	github.com/mdempsky/gocode v0.0.0-20190203001940-7fb65232883f // indirect
 	github.com/neelance/parallel v0.0.0-20160708114440-4de9ce63d14c // indirect
 	github.com/opentracing/basictracer-go v1.0.0 // indirect
 	github.com/opentracing/opentracing-go v1.1.0 // indirect
@@ -13,7 +14,7 @@
 	github.com/sourcegraph/go-langserver v2.0.0+incompatible // indirect
 	github.com/sourcegraph/jsonrpc2 v0.0.0-20190106185902-35a74f039c6a // indirect
 	golang.org/x/lint v0.0.0-20190930215403-16217165b5de // indirect
-	golang.org/x/tools v0.0.0-20191021224128-7178990c2503 // indirect
+	golang.org/x/tools v0.0.0-20191022074931-774d2ec196ee // indirect
 )
 
 go 1.13
diff --git a/go.sum b/go.sum
index 556c79c..92c8c07 100644
--- a/go.sum
+++ b/go.sum
@@ -27,6 +27,8 @@
 github.com/kr/logfmt v0.0.0-20140226030751-b84e30acd515/go.mod h1:+0opPa2QZZtGFBFZlji/RkVcI2GknAs/DXo4wKdlNEc=
 github.com/matttproud/golang_protobuf_extensions v1.0.1 h1:4hp9jkHxhMHkqkrB3Ix0jegS5sx/RkqARlsWZ6pIwiU=
 github.com/matttproud/golang_protobuf_extensions v1.0.1/go.mod h1:D8He9yQNgCq6Z5Ld7szi9bcBfOoFv/3dc6xSMkL2PC0=
+github.com/mdempsky/gocode v0.0.0-20190203001940-7fb65232883f h1:ee+twVCignaZjt7jpbMSLxAeTN/Nfq9W/nm91E7QO1A=
+github.com/mdempsky/gocode v0.0.0-20190203001940-7fb65232883f/go.mod h1:hltEC42XzfMNgg0S1v6JTywwra2Mu6F6cLR03debVQ8=
 github.com/mwitkow/go-conntrack v0.0.0-20161129095857-cc309e4a2223/go.mod h1:qRWi+5nqEBWmkhHvq77mSJWrCKwh8bxhgT7d/eI7P4U=
 github.com/neelance/parallel v0.0.0-20160708114440-4de9ce63d14c h1:NZOii9TDGRAfCS5VM16XnF4K7afoLQmIiZX8EkKnxtE=
 github.com/neelance/parallel v0.0.0-20160708114440-4de9ce63d14c/go.mod h1:eTBvSIlRgLo+CNFFQRQTwUGTZOEdvXIKeZS/xG+D2yU=
@@ -89,6 +91,8 @@
 golang.org/x/tools v0.0.0-20190520220859-26647e34d3c0/go.mod h1:RgjU9mgBXZiqYHBnxXauZ1Gv1EHHAz9KjViQ78xBX0Q=
 golang.org/x/tools v0.0.0-20191021224128-7178990c2503 h1:p5I5qqdhgoR6HIkb5DERflOgVfSkE/BjgCc5AdjWpWE=
 golang.org/x/tools v0.0.0-20191021224128-7178990c2503/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
+golang.org/x/tools v0.0.0-20191022074931-774d2ec196ee h1:ZLYwrbapYXNQ3n6e8thW6VN7mHoao8ig10ydUi8VO4Q=
+golang.org/x/tools v0.0.0-20191022074931-774d2ec196ee/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
 golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 gopkg.in/alecthomas/kingpin.v2 v2.2.6/go.mod h1:FMv+mEhP44yOT+4EoQTLFTRgOQ1FBLkstjWtayDeSgw=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=