diff --git a/check50/_api.py b/check50/_api.py
index f655b1b..7b0b1ec 100644
--- a/check50/_api.py
+++ b/check50/_api.py
@@ -515,7 +515,7 @@ def _copy(src, dst):
     """Copy src to dst, copying recursively if src is a directory."""
     try:
         shutil.copy(src, dst)
-    except IsADirectoryError:
+    except (FileNotFoundError, IsADirectoryError):
         if os.path.isdir(dst):
             dst = os.path.join(dst, os.path.basename(src))
         shutil.copytree(src, dst)
diff --git a/setup.py b/setup.py
index 5ab7b2b..8fe6233 100644
--- a/setup.py
+++ b/setup.py
@@ -29,6 +29,6 @@
         "console_scripts": ["check50=check50.__main__:main"]
     },
     url="https://github.com/cs50/check50",
-    version="3.3.3",
+    version="3.3.4",
     include_package_data=True
 )