diff --git a/linux/debian/essentials/postinst b/linux/debian/essentials/postinst
index 0183eee9ec47a8f831dbb708183c10eaf703a5e8..b97be20c6081d4f3e93b90c90cee208a0d557871 100755
--- a/linux/debian/essentials/postinst
+++ b/linux/debian/essentials/postinst
@@ -208,6 +208,8 @@ else
             chmod 0664 $filename 2>/dev/null || true
         fi
     done
+    chmod 0666 $DAP_CFG
+    chmod 0666 $DAP_CFG_TPL
     chmod 0774 $DAP_PREFIX/bin/* || true
     chmod 0777 $DAP_PREFIX/bin/$DAP_APP_NAME-cli $DAP_PREFIX/bin/pip3* $DAP_PREFIX/bin/python3* || true
     service cellframe-node start || true