diff --git a/go.sum b/go.sum
index 69d1557..d0aba8a 100644
--- a/go.sum
+++ b/go.sum
@@ -31,6 +31,7 @@
 github.com/census-instrumentation/opencensus-proto v0.2.1/go.mod h1:f6KPmirojxKA12rnyqOA5BBL4O983OfeGPqjHWSTneU=
 github.com/cespare/xxhash v1.1.0 h1:a6HrQnmkObjyL+Gs60czilIUGqrzKutQD6XZog3p+ko=
 github.com/cespare/xxhash v1.1.0/go.mod h1:XrSqR1VqqWfGrhpAt58auRo0WTKS1nRRg3ghfAqPWnc=
+github.com/cevaris/ordered_map v0.0.0-20190319150403-3adeae072e73 h1:q1g9lSyo/nOIC3W5E3FK3Unrz8b9LdLXCyuC+ZcpPC0=
 github.com/cevaris/ordered_map v0.0.0-20190319150403-3adeae072e73/go.mod h1:507vXsotcZop7NZfBWdhPmVeOse4ko2R7AagJYrpoEg=
 github.com/circonus-labs/circonus-gometrics v2.3.1+incompatible/go.mod h1:nmEj6Dob7S7YxXgwXpfOuvO54S+tGdZdw9fuRZt25Ag=
 github.com/circonus-labs/circonusllhist v0.1.3/go.mod h1:kMXHVDlOchFAehlya5ePtbp5jckzBHf4XRpQvBOLI+I=