diff --git a/src/poetry/core/packages/dependency.py b/src/poetry/core/packages/dependency.py
index c01ede94f..a539d59b6 100644
--- a/src/poetry/core/packages/dependency.py
+++ b/src/poetry/core/packages/dependency.py
@@ -253,7 +253,7 @@ def base_pep_508_name(self) -> str:
         requirement = self.pretty_name
 
         if self.extras:
-            extras = ",".join(self.extras)
+            extras = ",".join(sorted(self.extras))
             requirement += f"[{extras}]"
 
         if isinstance(self.constraint, VersionUnion):