diff --git a/crytic_compile/platform/etherscan.py b/crytic_compile/platform/etherscan.py
index c3d561fb..7ba17efe 100644
--- a/crytic_compile/platform/etherscan.py
+++ b/crytic_compile/platform/etherscan.py
@@ -361,7 +361,7 @@ def compile(self, crytic_compile: "CryticCompile", **kwargs: str) -> None:
 
         if "Proxy" in result and result["Proxy"] == "1":
             assert "Implementation" in result
-            implementation = result["Implementation"]
+            implementation = str(result["Implementation"])
             if prefix is not None:
                 implementation = f"{prefix}:{implementation}"
             compilation_unit.implementation_address = implementation