diff --git a/requirements-git.txt b/requirements-git.txt
index d4658369cf..b6e9e8e1dd 100644
--- a/requirements-git.txt
+++ b/requirements-git.txt
@@ -4,3 +4,4 @@ git+https://github.com/FInAT/FInAT.git#egg=finat
 git+https://github.com/firedrakeproject/tsfc.git#egg=tsfc
 git+https://github.com/OP2/PyOP2.git#egg=pyop2
 git+https://github.com/dolfin-adjoint/pyadjoint.git#egg=pyadjoint
+git+https://github.com/firedrakeproject/petsc.git@firedrake#egg=petsc
diff --git a/scripts/firedrake-install b/scripts/firedrake-install
index 7ca37f44c8..565b5b2681 100755
--- a/scripts/firedrake-install
+++ b/scripts/firedrake-install
@@ -1568,7 +1568,7 @@ if mode == "install":
         run_pip(["install", "lazy-object-proxy==1.4.*"])
 
     packages = clone_dependencies("firedrake")
-    packages = clone_dependencies("PyOP2") + packages
+    packages = clone_dependencies("PyOP2") + ["petsc4py"] + packages
     packages += ["firedrake"]
 
     for p in options["packages"]: