diff --git a/_constraints b/_constraints
new file mode 100644
index 0000000..ba02297
--- /dev/null
+++ b/_constraints
@@ -0,0 +1,7 @@
+<constraints>
+  <hardware>
+    <disk>
+      <size unit="G">4</size>
+    </disk>
+  </hardware>
+</constraints>
diff --git a/ghc-hledger-lib.changes b/ghc-hledger-lib.changes
index ddafc68..b1bcc2a 100644
--- a/ghc-hledger-lib.changes
+++ b/ghc-hledger-lib.changes
@@ -1,3 +1,8 @@
+-------------------------------------------------------------------
+Thu Jul 23 12:41:08 UTC 2020 - Michel Normand <normand@linux.vnet.ibm.com>
+
+- Add _constraints default 4GB disk space
+
 -------------------------------------------------------------------
 Mon Jun 22 02:00:23 UTC 2020 - psimons@suse.com