diff --git a/backend/pyproject.toml b/backend/pyproject.toml
index 5c8be296..b4aff29a 100644
--- a/backend/pyproject.toml
+++ b/backend/pyproject.toml
@@ -31,7 +31,7 @@ dependencies = [
     "connexion[swagger-ui]",
     "connexion[flask]",
     "flask_bcrypt",
-    "bcrypt<5",
+    "bcrypt<6",
     "flask_mail",
     "Flask",
     "Flask-SQLAlchemy",
diff --git a/backend/requirements-pinned.txt b/backend/requirements-pinned.txt
index 54cee343..db288cd1 100644
--- a/backend/requirements-pinned.txt
+++ b/backend/requirements-pinned.txt
@@ -19,7 +19,7 @@ attrs==26.1.0
     # via
     #   jsonschema
     #   referencing
-bcrypt==4.3.0
+bcrypt==5.0.0
     # via
     #   ibutsu-server (pyproject.toml)
     #   flask-bcrypt