diff --git a/backend/requirements-dev.txt b/backend/requirements-dev.txt
index 15f76087..51d4c611 100644
--- a/backend/requirements-dev.txt
+++ b/backend/requirements-dev.txt
@@ -9,7 +9,7 @@ httpx==0.27.0
 idna==3.3
 pydantic==2.6.4
 pydantic-settings==2.2.1
-pyinstaller==6.5.0
+pyinstaller==5.3
 python-multipart==0.0.5
 chardet
 pyyaml
diff --git a/backend/requirements.txt b/backend/requirements.txt
index 3d69fa09..bbe0a007 100644
--- a/backend/requirements.txt
+++ b/backend/requirements.txt
@@ -8,7 +8,7 @@ h11==0.13.0
 idna==3.3
 pydantic==2.6.4
 pydantic-settings==2.2.1
-pyinstaller==6.5.0
+pyinstaller==5.3
 python-multipart==0.0.5
 chardet
 pyyaml