diff --git a/recipe/increase_build_number.py b/recipe/increase_build_number.py
index 7a0848a3..3366601b 100644
--- a/recipe/increase_build_number.py
+++ b/recipe/increase_build_number.py
@@ -1,13 +1,27 @@
 #!/usr/bin/env python
 
 import re
+import requests
 
+
+# read meta.yaml file
 with open("recipe/meta.yaml", "r") as f:
     text = f.read()
 
+# increase build number
 build_number_old = int(re.search(r"(?<={% set build_number = )\d+", text)[0])
 build_number_new = build_number_old + 1
 print(f"set build_number from build_number {build_number_old} to {build_number_new}")
 text = re.sub(r"(?<={% set build_number = )\d+", str(build_number_new), text)
+
+# set sha256sum
+url = "https://github.com/FreeCAD/FreeCAD-Bundle/releases/download/weekly-builds/freecad_source.tar.gz-SHA256.txt"
+response = requests.get(url)
+response.raise_for_status()
+sha256 = response.content.decode('utf-8')
+print(f"set sha256:  {sha256}")
+text = re.sub(r'(?<={% set sha256 = ")[a-fA-F0-9]+(?=" %})', str(sha256), text)
+
+# write meta.yaml file
 with open("recipe/meta.yaml", "w") as f:
     f.write(text)
diff --git a/recipe/meta.yaml b/recipe/meta.yaml
index 432c4932..6f5cfc4e 100644
--- a/recipe/meta.yaml
+++ b/recipe/meta.yaml
@@ -2,6 +2,7 @@
 {% set version = "1.1dev" %}
 {% set build_number = 34 %}
 {% set build_number = build_number + 500 %}  # [FEATURE_DEBUG]
+{% set sha256 = "5fbfb92908b23611308b733bb1679bd1610c37d6fce26320af8ae709f16dc526" %}
 
 package:
     name: {{ name }}
@@ -10,7 +11,7 @@ package:
 source:
     url: https://github.com/FreeCAD/FreeCAD-Bundle/releases/download/weekly-builds/freecad_source.tar.gz
     fn: freecad_source_{{ build_number }}.tar.gz
-    # sha256:
+    sha256: {{ sha256 }}
     patches:
         - patches/osx_arm64_cross_compiling.patch    # [build_platform != target_platform and osx]