diff --git a/.ci/install.sh b/.ci/install.sh
index d8dd67f..c1f4235 100755
--- a/.ci/install.sh
+++ b/.ci/install.sh
@@ -4,6 +4,10 @@ set -ex
 
 if [ "$TRAVIS_OS_NAME" = "osx" ]; then
     brew update
+
+    # uninstall packages, that would get upgraded by upgrading cmake (and we don't need)
+    brew uninstall --force cgal node sfcgal postgis
+
     brew install qt5 lmdb clang-format ninja libsodium cmark
     brew upgrade boost cmake icu4c || true
 
diff --git a/.ci/linux/deploy.sh b/.ci/linux/deploy.sh
index 61b2e40..2caf5e0 100755
--- a/.ci/linux/deploy.sh
+++ b/.ci/linux/deploy.sh
@@ -25,8 +25,8 @@ for iconSize in 16 32 48 64 128 256 512; do
 done
 
 # Only download the file when not already present
-if ! [ -f linuxdeployqt-continuous-x86_64.AppImage ] ; then
-	wget -c "https://github.com/probonopd/linuxdeployqt/releases/download/continuous/linuxdeployqt-continuous-x86_64.AppImage"
+if ! [ -f linuxdeployqt-6-x86_64.AppImage ] ; then
+	wget -c "https://github.com/probonopd/linuxdeployqt/releases/download/6/linuxdeployqt-6-x86_64.AppImage"
 fi
 chmod a+x linuxdeployqt*.AppImage
 
diff --git a/src/Utils.cpp b/src/Utils.cpp
index 400d9e7..c60adb5 100644
--- a/src/Utils.cpp
+++ b/src/Utils.cpp
@@ -324,10 +324,25 @@ utils::linkifyMessage(const QString &body)
         return doc;
 }
 
+QByteArray escapeRawHtml(const QByteArray &data) {
+      QByteArray buffer;
+      const size_t length = data.size();
+      buffer.reserve(length);
+      for(size_t pos = 0; pos != length; ++pos) {
+            switch(data.at(pos)) {
+                  case '&':  buffer.append("&");      break;
+                  case '<':  buffer.append("&lt;");       break;
+                  case '>':  buffer.append("&gt;");       break;
+                  default:   buffer.append(data.at(pos)); break;
+            }
+      }
+     return buffer;
+}
+
 QString
 utils::markdownToHtml(const QString &text)
 {
-        const auto str = text.toUtf8();
+        const auto str = escapeRawHtml(text.toUtf8());
         const char *tmp_buf =
           cmark_markdown_to_html(str.constData(), str.size(), CMARK_OPT_DEFAULT);