diff --git a/_constraints b/_constraints
index 8616b57..3a6a344 100644
--- a/_constraints
+++ b/_constraints
@@ -6,6 +6,9 @@
   <memory>
    <size unit="G">9</size>
   </memory>
+  <physicalmemory>
+   <size unit="G">4</size>
+  </physicalmemory>
   <processors>4</processors>
  </hardware>
 </constraints>
diff --git a/libqt5-qtwebengine.changes b/libqt5-qtwebengine.changes
index 00c31e2..35bfe54 100644
--- a/libqt5-qtwebengine.changes
+++ b/libqt5-qtwebengine.changes
@@ -1,3 +1,10 @@
+-------------------------------------------------------------------
+Sat Jun 30 09:22:22 UTC 2018 - fabian@ritter-vogt.de
+
+- Enable building against the system ICU again
+- Add physicalmemory >= 5GiB to _constraints in the hope to speed up
+  builds
+
 -------------------------------------------------------------------
 Tue Jun 19 10:52:44 CEST 2018 - fabian@ritter-vogt.de
 
diff --git a/libqt5-qtwebengine.spec b/libqt5-qtwebengine.spec
index fff1e73..c6b8021 100644
--- a/libqt5-qtwebengine.spec
+++ b/libqt5-qtwebengine.spec
@@ -28,8 +28,7 @@
 %if %{?suse_version} < 1330
 %bcond_with system_icu
 %else
-# Change to without once ICU 59 is supported
-%bcond_with system_icu
+%bcond_without system_icu
 %endif
 %if %{?suse_version} >= 1330 || (0%{?is_opensuse} && 0%{?sle_version} >= 120200)
 %bcond_without system_ffmpeg