diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index fa35f425..8d1e680c 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -7,7 +7,7 @@ on:
     branches: [ master ]
 
 env:
-  LIBLOUIS_VERSION: 3.27.0
+  LIBLOUIS_VERSION: 3.28.0
 
 jobs:
   build:
diff --git a/.github/workflows/sanitizer.yml b/.github/workflows/sanitizer.yml
index 310cb7f5..26116b26 100644
--- a/.github/workflows/sanitizer.yml
+++ b/.github/workflows/sanitizer.yml
@@ -12,7 +12,7 @@ on:
     branches: [ master ]
 
 env:
-  LIBLOUIS_VERSION: 3.27.0
+  LIBLOUIS_VERSION: 3.28.0
 
 jobs:
   sanitizer:
diff --git a/Dockerfile.win32 b/Dockerfile.win32
index 2868acc6..b1640293 100644
--- a/Dockerfile.win32
+++ b/Dockerfile.win32
@@ -29,7 +29,7 @@ RUN apt-get update && dpkg --add-architecture i386 && apt-get update && apt-get
    && rm -rf /var/lib/apt/lists/*
 
 ARG LIBYAML_VERSION=0.1.4
-ARG LIBLOUIS_VERSION=3.27.0
+ARG LIBLOUIS_VERSION=3.28.0
 ARG LIBXML2_VERSION=2.9.9
 ENV HOST=i686-w64-mingw32 \
     PREFIX=/usr/build/win32 \
diff --git a/Dockerfile.win64 b/Dockerfile.win64
index 91b9c32b..bc969c5f 100644
--- a/Dockerfile.win64
+++ b/Dockerfile.win64
@@ -21,7 +21,7 @@ RUN apt-get update && apt-get install -y \
    && rm -rf /var/lib/apt/lists/*
 
 ARG LIBYAML_VERSION=0.1.4
-ARG LIBLOUIS_VERSION=3.27.0
+ARG LIBLOUIS_VERSION=3.28.0
 ARG LIBXML2_VERSION=2.9.9
 ENV HOST=x86_64-w64-mingw32 \
     PREFIX=/usr/build/win64 \
diff --git a/tests/Makefile.am b/tests/Makefile.am
index b915a617..2dd95499 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -604,9 +604,14 @@ XFAIL_TESTS +=					\
 	test_mathml_woluwe/test_075.test	\
 	test_mathml_woluwe/test_076.test	\
 	test_mathml_woluwe/test_078.test	\
+	test_mathml_woluwe/test_080.test	\
 	test_mathml_woluwe/test_093.test	\
 	test_mathml_woluwe/test_096.test	\
-	test_mathml_woluwe/test_099.test
+	test_mathml_woluwe/test_099.test	\
+	test_mathml_woluwe/test_106.test	\
+	test_mathml_woluwe/test_107.test	\
+	test_mathml_woluwe/test_113.test	\
+	test_mathml_woluwe/test_114.test
 
 TESTS =						\
 	$(check_PROGRAMS)			\