diff --git a/CHANGES.rst b/CHANGES.rst
index 1ec7459..1e5ca97 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -5,7 +5,8 @@ N&S Dependency Loader changelog
 1.2.16 (unreleased)
 -------------------
 
-- Nothing changed yet.
+- Add mistune
+- Remove python-slugify
 
 
 1.2.15 (2026-04-10)
diff --git a/dependencies.py b/dependencies.py
index 901e4a8..f28d99d 100644
--- a/dependencies.py
+++ b/dependencies.py
@@ -69,8 +69,7 @@
     Dependency("annotated-types", "annotated_types", "==0.6.*", False),
     Dependency("pydantic", "pydantic", "==2.11.10", False),
     Dependency("pydantic-core", "pydantic_core", "==2.33.2", False),
-    Dependency("text-unidecode", "text_unidecode", "", False),
-    Dependency("python-slugify", "slugify", "", False)
+    Dependency("mistune", "mistune", "", False),
 ]
 
 # On Windows, the hdf5 binary and thus h5py version depends on the QGis version
diff --git a/external-dependencies/populate.sh b/external-dependencies/populate.sh
index 6d6426c..97ec608 100755
--- a/external-dependencies/populate.sh
+++ b/external-dependencies/populate.sh
@@ -46,8 +46,7 @@ bridgestyle \
 pydantic \
 typing-inspection \
 annotated-types \
-text-unidecode \
-python-slugify
+mistune
 
 # Start a build/ directory for easier later cleanup.
 mkdir build