diff --git a/requirements.txt b/requirements.txt
index c4c46c09a..0f3c6dc94 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -34,3 +34,5 @@ requests<2.26  # pin for py3.5 support
 # Documentation requirements
 sphinx
 sphinxcontrib-asyncio
+# https://github.com/go-macaroon-bakery/py-macaroon-bakery/issues/94
+macaroonbakery!=1.3.3
diff --git a/setup.py b/setup.py
index 00e19cdfb..ed68025c3 100644
--- a/setup.py
+++ b/setup.py
@@ -41,6 +41,9 @@
     'PyYAML',
     'tenacity',
     'python-libmaas',
+
+    # https://github.com/go-macaroon-bakery/py-macaroon-bakery/issues/94
+    'macaroonbakery != 1.3.3',
 ]
 
 tests_require = [
diff --git a/test-requirements.txt b/test-requirements.txt
index e93a02978..32293644e 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -19,3 +19,5 @@ python-novaclient
 tenacity
 # Fix upper version to ensure compatibility with Juju 3.1
 juju<3.2
+# https://github.com/go-macaroon-bakery/py-macaroon-bakery/issues/94
+macaroonbakery!=1.3.3