diff --git a/NEWS.md b/NEWS.md
index 06eb625ec..586296bc7 100644
--- a/NEWS.md
+++ b/NEWS.md
@@ -1,3 +1,11 @@
+# Version ?
+
+## Build system changes
+
+* Qt 5.4.0 or newer has required (up from 5.3.0) since version 30.0.0; I just
+  forgot to include this entry.
+
+
 # Version 30.1.0 "Forever And More" 2019-01-05
 
 ## Bug fixes
diff --git a/README.md b/README.md
index 07c45327b..9749399a5 100644
--- a/README.md
+++ b/README.md
@@ -144,7 +144,7 @@ These libraries are:
 Other libraries are optional and only limit the features that are
 built. These include:
 
-- [Qt](http://www.qt.io/) v5.3 or newer — a cross-platform GUI
+- [Qt](http://www.qt.io/) v5.4 or newer — a cross-platform GUI
   toolkit. You need this if you want to use the MKVToolNix GUI.
 
 - [cmark](https://github.com/commonmark/cmark) — the CommonMark
diff --git a/ac/qt5.m4 b/ac/qt5.m4
index e68f09b75..87624f239 100644
--- a/ac/qt5.m4
+++ b/ac/qt5.m4
@@ -2,7 +2,7 @@ dnl
 dnl Check for Qt 5
 dnl
 
-qt_min_ver=5.3.0
+qt_min_ver=5.4.0
 
 AC_ARG_ENABLE([qt],
   AC_HELP_STRING([--enable-qt],[compile the Qt-based MKVToolNix GUI (yes)]),