diff --git a/go.mod b/go.mod
index 626c6c2c898..2fb8c7ac3f8 100644
--- a/go.mod
+++ b/go.mod
@@ -36,7 +36,7 @@ require (
 	github.com/pelletier/go-toml v1.8.0 // indirect
 	github.com/pquerna/cachecontrol v0.0.0-20200819021114-67c6ae64274f // indirect
 	github.com/prometheus/client_golang v1.8.0
-	github.com/prometheus/common v0.15.0
+	github.com/prometheus/common v0.21.0
 	github.com/prometheus/prometheus v1.8.2-0.20201105135750-00f16d1ac3a4
 	github.com/rs/cors v1.7.0
 	github.com/shirou/gopsutil v3.20.11+incompatible
diff --git a/go.sum b/go.sum
index 52d75b5b662..aeabd4a3ea8 100644
--- a/go.sum
+++ b/go.sum
@@ -823,8 +823,8 @@ github.com/prometheus/common v0.7.0/go.mod h1:DjGbpBbp5NYNiECxcL/VnbXCCaQpKd3tt2
 github.com/prometheus/common v0.9.1/go.mod h1:yhUN8i9wzaXS3w1O07YhxHEBxD+W35wd8bs7vj7HSQ4=
 github.com/prometheus/common v0.10.0/go.mod h1:Tlit/dnDKsSWFlCLTWaA1cyBgKHSMdTB80sz/V91rCo=
 github.com/prometheus/common v0.14.0/go.mod h1:U+gB1OBLb1lF3O42bTCL+FK18tX9Oar16Clt/msog/s=
-github.com/prometheus/common v0.15.0 h1:4fgOnadei3EZvgRwxJ7RMpG1k1pOZth5Pc13tyspaKM=
-github.com/prometheus/common v0.15.0/go.mod h1:U+gB1OBLb1lF3O42bTCL+FK18tX9Oar16Clt/msog/s=
+github.com/prometheus/common v0.21.0 h1:SMvI2JVldvfUvRVlP64jkIJEC6WiGHJcN2e5tB+ztF8=
+github.com/prometheus/common v0.21.0/go.mod h1:U+gB1OBLb1lF3O42bTCL+FK18tX9Oar16Clt/msog/s=
 github.com/prometheus/procfs v0.0.0-20181005140218-185b4288413d/go.mod h1:c3At6R/oaqEKCNdg8wHV1ftS6bRYblBhIjjI8uT2IGk=
 github.com/prometheus/procfs v0.0.0-20181204211112-1dc9a6cbc91a/go.mod h1:c3At6R/oaqEKCNdg8wHV1ftS6bRYblBhIjjI8uT2IGk=
 github.com/prometheus/procfs v0.0.0-20190117184657-bf6a532e95b1/go.mod h1:c3At6R/oaqEKCNdg8wHV1ftS6bRYblBhIjjI8uT2IGk=