diff --git a/instrumentation/opentelemetry_phoenix/mix.exs b/instrumentation/opentelemetry_phoenix/mix.exs
index c920f50..8e1bd50 100644
--- a/instrumentation/opentelemetry_phoenix/mix.exs
+++ b/instrumentation/opentelemetry_phoenix/mix.exs
@@ -21,7 +21,7 @@ defmodule OpentelemetryPhoenix.MixProject do
       ],
       elixirc_paths: elixirc_paths(Mix.env()),
       package: package(),
-      source_url: "https://github.com/open-telemetry/opentelemetry-erlang-contrib/instrumentation/opentelemetry_phoenix"
+      source_url: "https://github.com/open-telemetry/opentelemetry-erlang-contrib/tree/main/instrumentation/opentelemetry_phoenix"
     ]
   end