diff --git a/go.sum b/go.sum
index 8193f25..8c97d1c 100644
--- a/go.sum
+++ b/go.sum
@@ -360,8 +360,6 @@ github.com/onsi/gomega v1.4.3/go.mod h1:ex+gbHU/CVuBBDIJjb2X0qEXbFg53c61hWP/1Cpa
 github.com/onsi/gomega v1.5.0/go.mod h1:ex+gbHU/CVuBBDIJjb2X0qEXbFg53c61hWP/1CpauHY=
 github.com/onsi/gomega v1.7.0 h1:XPnZz8VVBHjVsy1vzJmRwIcSwiUO+JFfrv/xGiigmME=
 github.com/onsi/gomega v1.7.0/go.mod h1:ex+gbHU/CVuBBDIJjb2X0qEXbFg53c61hWP/1CpauHY=
-github.com/ooni/probe-engine v0.13.0 h1:K1kPefC6PGFpuFYXymLgsEdwnLeCf6k6I47OjFv4/vM=
-github.com/ooni/probe-engine v0.13.0/go.mod h1:Y5o5zVyqVMOyUNmpDJ+i5hGaJNIiK4j73QMuANXpfQI=
 github.com/ooni/probe-engine v0.13.1 h1:XSSVv5+ZTL/g5YgaoBKKofrKBmTVQXnFFEnIx5ivXIM=
 github.com/ooni/probe-engine v0.13.1/go.mod h1:Y5o5zVyqVMOyUNmpDJ+i5hGaJNIiK4j73QMuANXpfQI=
 github.com/op/go-logging v0.0.0-20160315200505-970db520ece7/go.mod h1:HzydrMdWErDVzsI23lYNej1Htcns9BCg93Dk0bBINWk=