diff --git a/gitlab_submodule/submodule_commit.py b/gitlab_submodule/submodule_commit.py
index ceb3eab..2e4fdb6 100644
--- a/gitlab_submodule/submodule_commit.py
+++ b/gitlab_submodule/submodule_commit.py
@@ -3,15 +3,11 @@
 from os import path
 from typing import Optional, Union
 
-from gitlab.exceptions import GitlabGetError
+from gitlab.exceptions import GitlabGetError, GitlabHttpError
 from gitlab.v4.objects import Project, ProjectCommit
 
 from gitlab_submodule.objects import Commit, Submodule
 
-
-logger = logging.getLogger(__name__)
-
-
 logger = logging.getLogger(__name__)
 
 
@@ -54,7 +50,7 @@ def _get_submodule_commit_id(
         submodule_dir = project.files.get(
             submodule_path,
             ref=ref if ref else project.default_branch)
-    except GitlabGetError:
+    except (GitlabGetError, GitlabHttpError):
         raise FileNotFoundError(
            f'Local submodule path "{submodule_path}" was not found for '
            f'project at url "{project.web_url}" - check if your .gitmodules '
diff --git a/gitlab_submodule/submodule_to_project.py b/gitlab_submodule/submodule_to_project.py
index 70af4c0..bca4260 100644
--- a/gitlab_submodule/submodule_to_project.py
+++ b/gitlab_submodule/submodule_to_project.py
@@ -1,10 +1,9 @@
-from typing import List, Optional, Union
-
 import logging
 import re
 from posixpath import join, normpath
+from typing import List, Optional, Union
 
-from gitlab.exceptions import GitlabGetError
+from gitlab.exceptions import GitlabGetError, GitlabHttpError
 from gitlab.v4.objects import Project, ProjectManager
 from giturlparse import GitUrlParsed, parse
 
@@ -28,7 +27,7 @@ def submodule_to_project(
     try:
         submodule_project = project_manager.get(
             submodule_project_path_with_namespace)
-    except GitlabGetError:
+    except (GitlabGetError, GitlabHttpError):
         # Repo doesn't actually exist (possible because you can modify
         # .gitmodules without using `git submodule add`)
         raise FileNotFoundError(