diff --git a/pkgs/applications/editors/emacs/sources.nix b/pkgs/applications/editors/emacs/sources.nix
index 9eaa4d119e53..91a60d5145b0 100644
--- a/pkgs/applications/editors/emacs/sources.nix
+++ b/pkgs/applications/editors/emacs/sources.nix
@@ -50,12 +50,12 @@ in
 
   emacs29 = import ./generic.nix {
     pname = "emacs";
-    version = "29.0.92";
+    version = "29.1-rc1";
     variant = "mainline";
     src = fetchFromSavannah {
       repo = "emacs";
-      rev = "29.0.92";
-      hash = "sha256-Vkry+2zYejZVwZKQlmQiAJnbjsj87DiIZ1ungooYd8A=";
+      rev = "29.1-rc1";
+      hash = "sha256-p0lBSKsHrFwYTqO5UVIF/PgiqwdhYQE4oUVcPtd+gsU=";
     };
 
     meta = mainlineMeta;