diff --git a/go.mod b/go.mod
index 745d606..cc3a3fd 100644
--- a/go.mod
+++ b/go.mod
@@ -1,8 +1,8 @@
 module golang.org/x/telemetry
 
-go 1.22.0
+go 1.21
 
-require golang.org/x/mod v0.21.0
+require golang.org/x/mod v0.20.0
 
 require (
 	golang.org/x/sync v0.8.0
diff --git a/go.sum b/go.sum
index b4f9588..408774b 100644
--- a/go.sum
+++ b/go.sum
@@ -1,5 +1,5 @@
-golang.org/x/mod v0.21.0 h1:vvrHzRwRfVKSiLrG+d4FMl/Qi4ukBCE6kZlTUkDYRT0=
-golang.org/x/mod v0.21.0/go.mod h1:6SkKJ3Xj0I0BrPOZoBy3bdMptDDU9oJrpohJ3eWZ1fY=
+golang.org/x/mod v0.20.0 h1:utOm6MM3R3dnawAiJgn0y+xvuYRsm1RKM/4giyfDgV0=
+golang.org/x/mod v0.20.0/go.mod h1:hTbmBsO62+eylJbnUtE2MGJUyE7QWk4xUqPFrRgJ+7c=
 golang.org/x/sync v0.8.0 h1:3NFvSEYkUoMifnESzZl15y791HH1qU2xm6eCJU5ZPXQ=
 golang.org/x/sync v0.8.0/go.mod h1:Czt+wKu1gCyEFDUtn0jG5QVvpJ6rzVqr5aXyt9drQfk=
 golang.org/x/sys v0.26.0 h1:KHjCJyddX0LoSTb3J+vWpupP9p0oznkqVk/IfjymZbo=