diff --git a/ubuntu18.04/cuda-devel/Dockerfile b/ubuntu18.04/cuda-devel/Dockerfile
index 0913bc432355907890f592eefbadecd5946dbbb4..9d69c5bd6e11683269009792eb0c621f4180f5d4 100644
--- a/ubuntu18.04/cuda-devel/Dockerfile
+++ b/ubuntu18.04/cuda-devel/Dockerfile
@@ -4,11 +4,11 @@ FROM git.imp.fu-berlin.de:5000/bioroboticslab/robofish/docker:base-ubuntu18.04
 RUN apt-get update && \
     apt-get install -y libopencv-dev && \
     cd /opt && \
-    curl -sSLO https://github.com/apache/incubator-mxnet/releases/download/1.4.1/apache-mxnet-src-1.4.1-incubating.tar.gz && \
-    tar -xf apache-mxnet-src-1.4.1-incubating.tar.gz --owner root --group root --no-same-owner && \
-    rm -f apache-mxnet-src-1.4.1-incubating.tar.gz && \
-    mv apache-mxnet-src-1.4.1-incubating mxnet-1.4.1 && \
-    cd mxnet-1.4.1 && \
+    curl -sSLO https://github.com/apache/incubator-mxnet/releases/download/1.5.1.rc0/apache-mxnet-src-1.5.1.rc0-incubating.tar.gz && \
+    tar -xf apache-mxnet-src-1.5.1.rc0-incubating.tar.gz --owner root --group root --no-same-owner && \
+    rm -f apache-mxnet-src-1.5.1.rc0-incubating.tar.gz && \
+    mv apache-mxnet-src-1.5.1.rc0-incubating mxnet-1.5.1 && \
+    cd mxnet-1.5.1 && \
     cmake -Bbuild -H. \
         -DCMAKE_CXX_STANDARD=14 -DUSE_CXX14_IF_AVAILABLE=ON \
         -DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX=/usr/local \
@@ -20,7 +20,6 @@ RUN apt-get update && \
         -DUSE_SIGNAL_HANDLER=ON \
         -DENABLE_CUDA_RTC=ON \
         -DBUILD_CPP_EXAMPLES=OFF \
-        -DDO_NOT_BUILD_EXAMPLES=ON \
         -DUSE_GPERFTOOLS=OFF \
         -DUSE_JEMALLOC=OFF \
         -G Ninja && \
@@ -28,4 +27,4 @@ RUN apt-get update && \
     cd python && \
     python3.7 setup.py install && \
     apt-get clean
-ENV MXNet_DIR /opt/mxnet-1.4.1
+ENV MXNet_DIR /opt/mxnet-1.5.1
diff --git a/ubuntu18.04/devel/Dockerfile b/ubuntu18.04/devel/Dockerfile
index c93b4efc73a6faeae8f7ececfa7758ea5cb1ddf2..de0547fd58622a9206b4a12ba69195eacf503525 100644
--- a/ubuntu18.04/devel/Dockerfile
+++ b/ubuntu18.04/devel/Dockerfile
@@ -3,11 +3,11 @@ FROM git.imp.fu-berlin.de:5000/bioroboticslab/robofish/docker:base-ubuntu18.04
 RUN apt-get update && \
     apt-get install -y libopencv-dev && \
     cd /opt && \
-    curl -sSLO https://github.com/apache/incubator-mxnet/releases/download/1.4.1/apache-mxnet-src-1.4.1-incubating.tar.gz && \
-    tar -xf apache-mxnet-src-1.4.1-incubating.tar.gz --owner root --group root --no-same-owner && \
-    rm -f apache-mxnet-src-1.4.1-incubating.tar.gz && \
-    mv apache-mxnet-src-1.4.1-incubating mxnet-1.4.1 && \
-    cd mxnet-1.4.1 && \
+    curl -sSLO https://github.com/apache/incubator-mxnet/releases/download/1.5.1.rc0/apache-mxnet-src-1.5.1.rc0-incubating.tar.gz && \
+    tar -xf apache-mxnet-src-1.5.1.rc0-incubating.tar.gz --owner root --group root --no-same-owner && \
+    rm -f apache-mxnet-src-1.5.1.rc0-incubating.tar.gz && \
+    mv apache-mxnet-src-1.5.1.rc0-incubating mxnet-1.5.1 && \
+    cd mxnet-1.5.1 && \
     cmake -Bbuild -H. \
         -DCMAKE_CXX_STANDARD=14 -DUSE_CXX14_IF_AVAILABLE=ON \
         -DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX=/usr/local \
@@ -19,7 +19,6 @@ RUN apt-get update && \
         -DUSE_SIGNAL_HANDLER=ON \
         -DENABLE_CUDA_RTC=OFF \
         -DBUILD_CPP_EXAMPLES=OFF \
-        -DDO_NOT_BUILD_EXAMPLES=ON \
         -DUSE_GPERFTOOLS=OFF \
         -DUSE_JEMALLOC=OFF \
         -G Ninja && \
@@ -27,4 +26,4 @@ RUN apt-get update && \
     cd python && \
     python3.7 setup.py install && \
     apt-get clean
-ENV MXNet_DIR /opt/mxnet-1.4.1
+ENV MXNet_DIR /opt/mxnet-1.5.1