diff --git a/debian/control b/debian/control
index 705dc40..6876512 100644
--- a/debian/control
+++ b/debian/control
@@ -1,31 +1,31 @@
 Source: swh-loader-git
 Maintainer: Software Heritage developers <swh-devel@inria.fr>
 Section: python
 Priority: optional
 Build-Depends: debhelper (>= 9),
                dh-python (>= 2),
                python3-all,
                python3-click,
-               python3-dulwich,
+               python3-dulwich (>= 0.18.7~),
                python3-nose,
                python3-retrying,
                python3-setuptools,
                python3-swh.core (>= 0.0.7~),
                python3-swh.loader.core (>= 0.0.22),
                python3-swh.model (>= 0.0.15~),
                python3-swh.scheduler (>= 0.0.14~),
                python3-swh.storage (>= 0.0.83~),
                python3-vcversioner
 Standards-Version: 3.9.6
 Homepage: https://forge.softwareheritage.org/diffusion/DLDG/
 
 Package: python3-swh.loader.git
 Architecture: all
 Depends: python3-swh.core (>= 0.0.7~),
          python3-swh.loader.core (>= 0.0.22~),
          python3-swh.model (>= 0.0.15~),
          python3-swh.scheduler (>= 0.0.14~),
          python3-swh.storage (>= 0.0.83~),
          ${misc:Depends},
          ${python3:Depends}
 Description: Software Heritage Git loader
diff --git a/requirements.txt b/requirements.txt
index 5925f74..b42ee35 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,4 @@
-dulwich
+dulwich >= 0.18.7
 retrying
 vcversioner
 click