diff --git a/.github/workflows/pyinstaller_win.yml b/.github/workflows/pyinstaller_win.yml
index a018d369..27d8c4b5 100644
--- a/.github/workflows/pyinstaller_win.yml
+++ b/.github/workflows/pyinstaller_win.yml
@@ -40,11 +40,10 @@ jobs:
           path: "fred"
 
       - name: Download fred from the Github Release
-        uses: i3h/download-release-asset@v1.2.0
+        uses: dsaltares/fetch-gh-release-asset@1.1.0
         with:
-          owner: "freenet"
-          repo: "fred"
-          tag: "latest"
+          repo: "freenet/fred"
+          version: "latest"
           file: "freenet.jar"
 
       - name: Building the installer
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4d47ab94..0b6cffbb 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,12 @@
 # Changelog
 
+## 3.1.0.1
+
+- Move docker to python-alpine for security reasons
+- Add sorting options of markers (applied automatically on AnnData observations)
+- Make Update View button always visible
+- Minor fixes
+
 ## 3.1
 
 - Adding HDF5 support on the client side
diff --git a/container/Dockerfile b/container/Dockerfile
index 7c23f41a..f6bd927d 100644
--- a/container/Dockerfile
+++ b/container/Dockerfile
@@ -9,8 +9,9 @@ RUN apk update \
 	&& apk upgrade
 RUN apk add vips hdf5 hdf5-dev
 
-RUN pip3 install --upgrade pip setuptools wheel && \
-    apk add --no-cache --virtual .build-deps gfortran openblas-dev gcc g++ zlib-dev make python3-dev jpeg-dev && \
+RUN apk add --no-cache openblas-dev && \
+    pip3 install --upgrade pip setuptools wheel && \
+    apk add --no-cache --virtual .build-deps gfortran gcc g++ zlib-dev make python3-dev jpeg-dev && \
     pip3 install -r /requirements.txt && \
     apk del .build-deps
 
diff --git a/tissuumaps/VERSION b/tissuumaps/VERSION
index 8c50098d..a9e279dd 100644
--- a/tissuumaps/VERSION
+++ b/tissuumaps/VERSION
@@ -1 +1 @@
-3.1
+3.1.0.1
diff --git a/tissuumaps/read_h5ad.py b/tissuumaps/read_h5ad.py
index 088f0c4b..5bcbd293 100644
--- a/tissuumaps/read_h5ad.py
+++ b/tissuumaps/read_h5ad.py
@@ -63,7 +63,7 @@ def getPalette(adata):
 def getVarList(adata):
     var = adata.get("/var")
     if "_index" in var.attrs.keys():
-        varIndex = adata.get("/var").attrs["_index"]
+        varIndex = str(adata.get("/var").attrs["_index"])
         varList = [x.decode("utf-8") for x in adata.get(f"/var/{varIndex}", [])]
     else:
         # TODO
@@ -361,6 +361,7 @@ def h5ad_to_tmap(basedir, path, library_id=None):
                 "scale_check": False,
                 "shape_col": False,
                 "shape_fixed": True,
+                "sortby_check": False,
                 "shape_gr": False,
                 "shape_gr_dict": False,
                 "shape_gr_rand": True,