diff --git a/MozillaFirefox.changes b/MozillaFirefox.changes
index 74e1632..5ae1e75 100644
--- a/MozillaFirefox.changes
+++ b/MozillaFirefox.changes
@@ -1,3 +1,8 @@
+-------------------------------------------------------------------
+Thu Aug  1 14:25:02 UTC 2019 - Guillaume GARDET <guillaume.gardet@opensuse.org>
+
+- Update build constraints to fix arm builds
+
 -------------------------------------------------------------------
 Fri Jul 19 08:11:27 UTC 2019 - Wolfgang Rosenauer <wr@rosenauer.org>
 
diff --git a/MozillaFirefox.spec b/MozillaFirefox.spec
index 3d57636..61ff95e 100644
--- a/MozillaFirefox.spec
+++ b/MozillaFirefox.spec
@@ -350,7 +350,7 @@ export CFLAGS="$CFLAGS -mminimal-toc"
 %endif
 export CXXFLAGS="$CFLAGS"
 export MOZCONFIG=$RPM_BUILD_DIR/mozconfig
-%limit_build -m 1500
+%limit_build -m 2000
 cat << EOF > $MOZCONFIG
 mk_add_options MOZILLA_OFFICIAL=1
 mk_add_options BUILD_OFFICIAL=1
diff --git a/_constraints b/_constraints
index a9da1dc..b933b77 100644
--- a/_constraints
+++ b/_constraints
@@ -2,7 +2,7 @@
 <constraints>
   <hardware>
     <disk>
-      <size unit="G">22</size>
+      <size unit="G">24</size>
     </disk>
     <memory>
       <size unit="G">8</size>
@@ -12,11 +12,23 @@
     <conditions>
       <arch>armv6l</arch>
       <arch>armv7l</arch>
+    </conditions>
+    <hardware>
+      <disk>
+        <size unit="G">12</size>
+      </disk>
+      <memory>
+        <size unit="G">5</size>
+      </memory>
+    </hardware>
+  </overwrite>
+  <overwrite>
+    <conditions>
       <arch>aarch64</arch>
     </conditions>
     <hardware>
       <memory>
-        <size unit="G">9</size>
+        <size unit="G">12</size>
       </memory>
     </hardware>
   </overwrite>