diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index 7aa12c9..825573a 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -1,3 +1,7 @@
+Version 0.5.3:
+
+* Switch from use of numpy type aliases to built in types for casting in process_file.py
+
 Version 0.5.2:
 
 * Replace all references to `lmfit.models.COMMON_DOC` with `lmfit.models.COMMON_INIT_DOC`
diff --git a/VERSION.txt b/VERSION.txt
index cb0c939..be14282 100644
--- a/VERSION.txt
+++ b/VERSION.txt
@@ -1 +1 @@
-0.5.2
+0.5.3