diff --git a/Unitful/versions/0.5.1/requires b/Unitful/versions/0.5.1/requires
new file mode 100644
index 00000000000..137767a42af
--- /dev/null
+++ b/Unitful/versions/0.5.1/requires
@@ -0,0 +1 @@
+julia 0.6
diff --git a/Unitful/versions/0.5.1/sha1 b/Unitful/versions/0.5.1/sha1
new file mode 100644
index 00000000000..c247f29eccd
--- /dev/null
+++ b/Unitful/versions/0.5.1/sha1
@@ -0,0 +1 @@
+a429e565c76579d0dae29a97bf782c587ab8ade1