diff --git a/build.sh b/build.sh
index 9ef2d4b..5a991a7 100755
--- a/build.sh
+++ b/build.sh
@@ -12,4 +12,5 @@ docker build --build-arg ARCHTAG=$ARCHTAG -t openwebrx-soapysdr-base:$ARCHTAG -f
 docker build --build-arg ARCHTAG=$ARCHTAG -t jketterl/openwebrx-sdrplay:$ARCHTAG -f docker/Dockerfiles/Dockerfile-sdrplay .
 docker build --build-arg ARCHTAG=$ARCHTAG -t jketterl/openwebrx-hackrf:$ARCHTAG -f docker/Dockerfiles/Dockerfile-hackrf .
 docker build --build-arg ARCHTAG=$ARCHTAG -t jketterl/openwebrx-airspy:$ARCHTAG -f docker/Dockerfiles/Dockerfile-airspy .
+docker build --build-arg ARCHTAG=$ARCHTAG -t jketterl/openwebrx-rtlsdr-soapy:$ARCHTAG -f docker/Dockerfiles/Dockerfile-rtlsdr-soapy .
 docker build --build-arg ARCHTAG=$ARCHTAG -t jketterl/openwebrx-full:$ARCHTAG -t jketterl/openwebrx:$ARCHTAG -f docker/Dockerfiles/Dockerfile-full .
diff --git a/csdr/csdr.py b/csdr/csdr.py
index f79bcd7..d6cfc11 100644
--- a/csdr/csdr.py
+++ b/csdr/csdr.py
@@ -225,7 +225,7 @@ class dsp(object):
             if self.fft_compression == "adpcm":
                 chain += ["csdr compress_fft_adpcm_f_u8 {secondary_fft_size}"]
             return chain
-        elif which == "bpsk31":
+        elif which == "bpsk31" or which == "bpsk63":
             return chain + [
                 "csdr shift_addition_cc --fifo {secondary_shift_pipe}",
                 "csdr bandpass_fir_fft_cc -{secondary_bpf_cutoff} {secondary_bpf_cutoff} {secondary_bpf_cutoff}",
@@ -268,21 +268,29 @@ class dsp(object):
     def secondary_bpf_cutoff(self):
         if self.secondary_demodulator == "bpsk31":
             return 31.25 / self.if_samp_rate()
+        elif self.secondary_demodulator == "bpsk63":
+            return 62.5 / self.if_samp_rate()
         return 0
 
     def secondary_bpf_transition_bw(self):
         if self.secondary_demodulator == "bpsk31":
             return 31.25 / self.if_samp_rate()
+        elif self.secondary_demodulator == "bpsk63":
+            return 62.5 / self.if_samp_rate()
         return 0
 
     def secondary_samples_per_bits(self):
         if self.secondary_demodulator == "bpsk31":
             return int(round(self.if_samp_rate() / 31.25)) & ~3
+        elif self.secondary_demodulator == "bpsk63":
+            return int(round(self.if_samp_rate() / 62.5)) & ~3
         return 0
 
     def secondary_bw(self):
         if self.secondary_demodulator == "bpsk31":
             return 31.25
+        elif self.secondary_demodulator == "bpsk63":
+            return 62.5
 
     def start_secondary_demodulator(self):
         if not self.secondary_demodulator:
diff --git a/docker/Dockerfiles/Dockerfile-airspy b/docker/Dockerfiles/Dockerfile-airspy
index 4d0a9c7..4383d0d 100644
--- a/docker/Dockerfiles/Dockerfile-airspy
+++ b/docker/Dockerfiles/Dockerfile-airspy
@@ -3,6 +3,8 @@ FROM openwebrx-soapysdr-base:$ARCHTAG
 
 ADD docker/scripts/install-dependencies-airspy.sh /
 RUN /install-dependencies-airspy.sh
+RUN rm /install-dependencies-airspy.sh
 
 ADD docker/scripts/install-connectors.sh /
 RUN /install-connectors.sh
+RUN rm /install-connectors.sh
diff --git a/docker/Dockerfiles/Dockerfile-base b/docker/Dockerfiles/Dockerfile-base
index 3333140..566f9d1 100644
--- a/docker/Dockerfiles/Dockerfile-base
+++ b/docker/Dockerfiles/Dockerfile-base
@@ -7,6 +7,7 @@ RUN ln -s /usr/local/lib /usr/local/lib64
 ADD docker/scripts/direwolf-1.5.patch /
 ADD docker/scripts/install-dependencies.sh /
 RUN /install-dependencies.sh
+RUN rm /install-dependencies.sh
 
 ADD . /opt/openwebrx
 
diff --git a/docker/Dockerfiles/Dockerfile-full b/docker/Dockerfiles/Dockerfile-full
index 5a9fa76..5d59e6a 100644
--- a/docker/Dockerfiles/Dockerfile-full
+++ b/docker/Dockerfiles/Dockerfile-full
@@ -9,6 +9,9 @@ RUN /install-dependencies-hackrf.sh
 RUN /install-dependencies-soapysdr.sh
 RUN /install-dependencies-sdrplay.sh
 RUN /install-dependencies-airspy.sh
+RUN /install-dependencies-rtlsdr-soapy.sh
+RUN rm /install-dependencies-*.sh
 
 ADD docker/scripts/install-connectors.sh /
 RUN /install-connectors.sh
+RUN rm /install-connectors.sh
diff --git a/docker/Dockerfiles/Dockerfile-hackrf b/docker/Dockerfiles/Dockerfile-hackrf
index 0b3aa00..57643ab 100644
--- a/docker/Dockerfiles/Dockerfile-hackrf
+++ b/docker/Dockerfiles/Dockerfile-hackrf
@@ -3,4 +3,5 @@ FROM openwebrx-base:$ARCHTAG
 
 ADD docker/scripts/install-dependencies-hackrf.sh /
 RUN /install-dependencies-hackrf.sh
+RUN rm /install-dependencies-hackrf.sh
 
diff --git a/docker/Dockerfiles/Dockerfile-rtlsdr b/docker/Dockerfiles/Dockerfile-rtlsdr
index e0c82bd..b0726da 100644
--- a/docker/Dockerfiles/Dockerfile-rtlsdr
+++ b/docker/Dockerfiles/Dockerfile-rtlsdr
@@ -3,6 +3,8 @@ FROM openwebrx-base:$ARCHTAG
 
 ADD docker/scripts/install-dependencies-rtlsdr.sh /
 RUN /install-dependencies-rtlsdr.sh
+RUN rm /install-dependencies-rtlsdr.sh
 
 ADD docker/scripts/install-connectors.sh /
 RUN /install-connectors.sh
+RUN rm /install-connectors.sh
diff --git a/docker/Dockerfiles/Dockerfile-rtlsdr-soapy b/docker/Dockerfiles/Dockerfile-rtlsdr-soapy
new file mode 100644
index 0000000..7989a6a
--- /dev/null
+++ b/docker/Dockerfiles/Dockerfile-rtlsdr-soapy
@@ -0,0 +1,10 @@
+ARG ARCHTAG
+FROM openwebrx-soapysdr-base:$ARCHTAG
+
+ADD docker/scripts/install-dependencies-rtlsdr-soapy.sh /
+RUN /install-dependencies-rtlsdr-soapy.sh
+RUN rm /install-dependencies-rtlsdr-soapy.sh
+
+ADD docker/scripts/install-connectors.sh /
+RUN /install-connectors.sh
+RUN rm /install-connectors.sh
diff --git a/docker/Dockerfiles/Dockerfile-sdrplay b/docker/Dockerfiles/Dockerfile-sdrplay
index 453ea00..f44f53b 100644
--- a/docker/Dockerfiles/Dockerfile-sdrplay
+++ b/docker/Dockerfiles/Dockerfile-sdrplay
@@ -4,6 +4,8 @@ FROM openwebrx-soapysdr-base:$ARCHTAG
 ADD docker/scripts/install-dependencies-sdrplay.sh /
 ADD docker/scripts/install-lib.*.patch /
 RUN /install-dependencies-sdrplay.sh
+RUN rm /install-dependencies-sdrplay.sh
 
 ADD docker/scripts/install-connectors.sh /
 RUN /install-connectors.sh
+RUN rm /install-connectors.sh
diff --git a/docker/Dockerfiles/Dockerfile-soapysdr b/docker/Dockerfiles/Dockerfile-soapysdr
index a4921e3..82b93e9 100644
--- a/docker/Dockerfiles/Dockerfile-soapysdr
+++ b/docker/Dockerfiles/Dockerfile-soapysdr
@@ -3,4 +3,5 @@ FROM openwebrx-base:$ARCHTAG
 
 ADD docker/scripts/install-dependencies-soapysdr.sh /
 RUN /install-dependencies-soapysdr.sh
+RUN rm /install-dependencies-soapysdr.sh
 
diff --git a/docker/scripts/install-dependencies-rtlsdr-soapy.sh b/docker/scripts/install-dependencies-rtlsdr-soapy.sh
new file mode 100755
index 0000000..11a0cd1
--- /dev/null
+++ b/docker/scripts/install-dependencies-rtlsdr-soapy.sh
@@ -0,0 +1,32 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+function cmakebuild() {
+  cd $1
+  if [[ ! -z "${2:-}" ]]; then
+    git checkout $2
+  fi
+  mkdir build
+  cd build
+  cmake ..
+  make
+  make install
+  cd ../..
+  rm -rf $1
+}
+
+cd /tmp
+
+STATIC_PACKAGES="libusb"
+BUILD_PACKAGES="git libusb-dev cmake make gcc musl-dev g++ linux-headers"
+
+apk add --no-cache $STATIC_PACKAGES
+apk add --no-cache --virtual .build-deps $BUILD_PACKAGES
+
+git clone https://github.com/osmocom/rtl-sdr.git
+cmakebuild rtl-sdr b5af355b1d833b3c898a61cf1e072b59b0ea3440
+
+git clone https://github.com/pothosware/SoapyRTLSDR.git
+cmakebuild SoapyRTLSDR 5c5d9503337c6d1c34b496dec6f908aab9478b0f
+
+apk del .build-deps
diff --git a/htdocs/index.html b/htdocs/index.html
index 4d63278..f18f659 100644
--- a/htdocs/index.html
+++ b/htdocs/index.html
@@ -185,6 +185,7 @@
                     <select id="openwebrx-secondary-demod-listbox" onchange="secondary_demod_listbox_changed();">
                         <option value="none"></option>
                         <option value="bpsk31">BPSK31</option>
+                        <option value="bpsk63">BPSK63</option>
                         <option value="ft8" data-feature="wsjt-x">FT8</option>
                         <option value="wspr" data-feature="wsjt-x">WSPR</option>
                         <option value="jt65" data-feature="wsjt-x">JT65</option>
diff --git a/htdocs/openwebrx.js b/htdocs/openwebrx.js
index 416981e..e81c4c1 100644
--- a/htdocs/openwebrx.js
+++ b/htdocs/openwebrx.js
@@ -1981,6 +1981,7 @@ function demodulator_digital_replace_last() {
 function demodulator_digital_replace(subtype) {
     switch (subtype) {
         case "bpsk31":
+        case "bpsk63":
         case "rtty":
         case "ft8":
         case "jt65":
diff --git a/owrx/wsjt.py b/owrx/wsjt.py
index 16d1a73..4818201 100644
--- a/owrx/wsjt.py
+++ b/owrx/wsjt.py
@@ -149,10 +149,9 @@ class WsjtChopper(threading.Thread):
 
     def decode(self, file):
         decoder = subprocess.Popen(
-            self.decoder_commandline(file),
+            ["nice", "-n", "10"] + self.decoder_commandline(file),
             stdout=subprocess.PIPE,
             cwd=self.tmp_dir,
-            preexec_fn=lambda: os.nice(10),
             close_fds=True,
         )
         for line in decoder.stdout:
diff --git a/push.sh b/push.sh
index 2edb72a..1bb5fde 100755
--- a/push.sh
+++ b/push.sh
@@ -7,11 +7,13 @@ ALL_ARCHS="x86_64 armv7l aarch64"
 TAG="latest"
 ARCHTAG="$TAG-$ARCH"
 
-for image in openwebrx-rtlsdr openwebrx-sdrplay openwebrx-hackrf openwebrx-airspy openwebrx-full openwebrx; do
+IMAGES="openwebrx-rtlsdr openwebrx-sdrplay openwebrx-hackrf openwebrx-airspy openwebrx-rtlsdr-soapy openwebrx-full openwebrx"
+
+for image in ${IMAGES}; do
   docker push jketterl/$image:$ARCHTAG
 done
 
-for image in openwebrx-rtlsdr openwebrx-sdrplay openwebrx-hackrf openwebrx-airspy openwebrx-full openwebrx; do
+for image in ${IMAGES}; do
   # there's no docker manifest rm command, and the create --amend does not work, so we have to clean up manually
   rm -rf "${HOME}/.docker/manifests/docker.io_jketterl_${image}-${TAG}"
   IMAGE_LIST=""