diff --git a/kcc-c2e.spec b/kcc-c2e.spec
index fa07d41..c8350a8 100644
--- a/kcc-c2e.spec
+++ b/kcc-c2e.spec
@@ -8,7 +8,7 @@ a = Analysis(['kcc-c2e.py'],
              pathex=['.'],
              binaries=[],
              datas=[],
-             hiddenimports=[],
+             hiddenimports=['_cffi_backend'],
              hookspath=[],
              runtime_hooks=[],
              excludes=[],
diff --git a/kcc-c2p.spec b/kcc-c2p.spec
index 8614c7f..72bac35 100644
--- a/kcc-c2p.spec
+++ b/kcc-c2p.spec
@@ -8,7 +8,7 @@ a = Analysis(['kcc-c2p.py'],
              pathex=['.'],
              binaries=[],
              datas=[],
-             hiddenimports=[],
+             hiddenimports=['_cffi_backend'],
              hookspath=[],
              runtime_hooks=[],
              excludes=[],
diff --git a/setup.py b/setup.py
index a926fd1..fe074ad 100644
--- a/setup.py
+++ b/setup.py
@@ -36,16 +36,16 @@ class BuildBinaryCommand(setuptools.Command):
     def run(self):
         VERSION = __version__
         if sys.platform == 'darwin':
-            os.system('pyinstaller -y -D -i icons/comic2ebook.icns -n "Kindle Comic Converter" -w -s kcc.py')
+            os.system('pyinstaller --hidden-import=_cffi_backend -y -D -i icons/comic2ebook.icns -n "Kindle Comic Converter" -w -s kcc.py')
             # TODO /usr/bin/codesign --force -s "$MACOS_CERTIFICATE_NAME" --options runtime dist/Applications/Kindle\ Comic\ Converter.app -v
             os.system(f'appdmg kcc.json dist/kcc_macos_{platform.processor()}_{VERSION}.dmg')
             sys.exit(0)
         elif sys.platform == 'win32':
-            os.system('pyinstaller -y -F -i icons\\comic2ebook.ico -n KCC_' + VERSION + ' -w --noupx kcc.py')
+            os.system('pyinstaller --hidden-import=_cffi_backend -y -F -i icons\\comic2ebook.ico -n KCC_' + VERSION + ' -w --noupx kcc.py')
             sys.exit(0)
         elif sys.platform == 'linux':
             os.system(
-                'pyinstaller --hidden-import=queue -y -F -i icons/comic2ebook.ico -n kcc_linux_' + VERSION + ' kcc.py')
+                'pyinstaller --hidden-import=_cffi_backend --hidden-import=queue -y -F -i icons/comic2ebook.ico -n kcc_linux_' + VERSION + ' kcc.py')
             sys.exit(0)
         else:
             sys.exit(0)