diff --git a/docker/Dockerfile b/docker/Dockerfile
index b17f2cb..d7f85f8 100644
--- a/docker/Dockerfile
+++ b/docker/Dockerfile
@@ -1,6 +1,6 @@
 # syntax=docker/dockerfile:1
 
-FROM alpine:latest 
+FROM python:alpine
 
 ENV TZ=Europe/Berlin
 ENV UNBUFFERED=1
@@ -11,10 +11,20 @@ VOLUME /app
 COPY . .
 
 RUN ln -snf /usr/share/zoneinfo/$TZ /etc/localtime && echo $TZ > /etc/timezone; \
-    /bin/sh -c 'apk update && apk add --no-cache gcc musl-dev python3-dev py3-wheel py3-pip py3-olm libffi-dev openssl-dev cargo zlib-dev jpeg-dev libmagic speex ffmpeg htop; \
-    pip install update pip && pip install -r requirements.txt ; \
-    apk del zlib-dev jpeg-dev gcc musl-dev python3-dev openssl-dev cargo;'
+    apk --no-cache update && apk add --no-cache  --virtual .build-deps \
+    gcc \
+    cargo \
+    libffi-dev \
+    openssl-dev \
+    olm-dev \
+    zlib-dev \
+    jpeg-dev ; \
+    apk add --no-cache olm libmagic ffmpeg speex; \
+    pip install pip -U --no-cache-dir; \
+    pip install --no-cache-dir -r requirements.txt ; \
+    apk del --no-cache .build-deps;
 
 
 
-ENTRYPOINT ["python3", "-u", "fritzab2matrix.py "]
+# ENTRYPOINT ["python3", "-u", "fritzab2matrix.py"]
+ENTRYPOINT /bin/sh -c "export UNBUFFERED=1 && python3 -u ./fritzab2matrix.py"
diff --git a/docker/docker-compose.yml b/docker/docker-compose.yml
index 49e9071..74ed631 100644
--- a/docker/docker-compose.yml
+++ b/docker/docker-compose.yml
@@ -7,7 +7,7 @@ services:
       context: ../.
       dockerfile: ./docker/Dockerfile
     working_dir: /app
-    entrypoint: /bin/sh -c "export UNBUFFERED=1 && python3 -u ./fritzab2matrix.py"
+#    entrypoint: /bin/sh -c "export UNBUFFERED=1 && python3 -u ./fritzab2matrix.py"
     volumes:
       - ../.:/app
 
diff --git a/fritzab2matrix.py b/fritzab2matrix.py
index 1a62c2e..d1c5dfa 100755
--- a/fritzab2matrix.py
+++ b/fritzab2matrix.py
@@ -70,13 +70,20 @@ def get_last_call():
     except:
         print("Couldn't connect to Box")
     missed_calls = fc.get_missed_calls(False,1,1)
-    return missed_calls[0]
+    
+    if len(missed_calls) > 0:
+        return missed_calls[0]
+    else:
+        return False
 
 def lastcall2matrix(tam,tam_no):
     # Call Watch to Matrix
     if env_call_watch and not at_least_one_new_message:
         c = get_last_call()
-        c_msg = "{} - {} ({})".format(c.Date, c.Caller, c.Name)
+        if c:
+            c_msg = "{} - {} ({})".format(c.Date, c.Caller, c.Name)
+        else:
+            return False
         
         # ... and send message and file to Matrix Room
         ## if Number of a TAM and the last call match
diff --git a/requirements.txt b/requirements.txt
index 6bafca2..808ef62 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -15,9 +15,9 @@ atomicwrites
 cachetools
 datetime
 markdown
-matrix-nio # [e2e]>=0.18.3
+matrix-nio[e2e]>=0.18.3
 peewee
 Pillow
-python_magic
+python-magic
 uuid