diff --git a/Dockerfile b/Dockerfile
index 36568ce..95db75b 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM alpine:3.10 AS build-base
+FROM alpine:3.13 AS build-base
 RUN apk add git make cmake g++ libusb-dev libpulse
 
 FROM build-base AS rtl_fm
@@ -8,18 +8,18 @@ WORKDIR /opt/rtl_sdr/build
 RUN cmake .. && make
 
 FROM build-base AS multimon
-ARG MULTIMON_VERSION=1.1.8
+ARG MULTIMON_VERSION=1.1.9
 RUN git clone --depth 1 --branch ${MULTIMON_VERSION} https://github.com/EliasOenal/multimon-ng.git /opt/multimon
 WORKDIR /opt/multimon/build
 RUN cmake .. && make
 
-FROM alpine:3.10 AS boswatch
+FROM alpine:3.13 AS boswatch
 ARG BW_VERSION=develop
 RUN apk add git && \
     git clone --depth 1 --branch ${BW_VERSION} https://github.com/BOSWatch/BW3-Core.git /opt/boswatch
 
 
-FROM python:3.6-alpine AS runner
+FROM python:3.9.1-alpine AS runner
 LABEL maintainer="bastian@schroll-software.de"
 
 #           for RTL    for MM
@@ -28,4 +28,4 @@ RUN apk add libusb-dev libpulse && \
 
 COPY --from=boswatch /opt/boswatch/ /opt/boswatch/
 COPY --from=multimon /opt/multimon/build/multimon-ng /opt/multimon/multimon-ng
-COPY --from=rtl_fm /opt/rtl_sdr/build/src/ /opt/rtl_sdr/build/src/
\ No newline at end of file
+COPY --from=rtl_fm /opt/rtl_sdr/build/src/ /opt/rtl_sdr/build/src/