diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 00b4b5200..47fc28f91 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -1,4 +1,4 @@
-# Contributing to Delta Chat
+# Contributing to chatmail core
 
 ## Bug reports
 
diff --git a/flake.nix b/flake.nix
index 4029e2ff8..84e05f1f8 100644
--- a/flake.nix
+++ b/flake.nix
@@ -1,5 +1,5 @@
 {
-  description = "Delta Chat core";
+  description = "Chatmail core";
   inputs = {
     fenix.url = "github:nix-community/fenix";
     flake-utils.url = "github:numtide/flake-utils";
diff --git a/standards.md b/standards.md
index 7ccf57768..f21e57bb5 100644
--- a/standards.md
+++ b/standards.md
@@ -1,6 +1,6 @@
-# Standards used in Delta Chat
+# Standards used in chatmail core
 
-Some of the standards Delta Chat is based on:
+Some of the standards chatmail is based on:
 
 Tasks                            | Standards
 -------------------------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------