diff --git a/deployment/dockerfiles/README.md b/deployment/dockerfiles/README.md
index f070aafe..df90ef99 100644
--- a/deployment/dockerfiles/README.md
+++ b/deployment/dockerfiles/README.md
@@ -15,14 +15,20 @@ docker login
 docker push <account>/<reponame>:<tag>
 
 
+Run docker images
+-----------------
+
+docker run -it <image> /bin/bash
+
+
 Update Guide
 ============
 
 # delete old docker images
 
 $ docker image ls
-$ docker rmi coatisoftware/centos6_64_qt_llvm:<tag>
-$ docker rmi coatisoftware/centos6_32_qt_llvm:<tag>
+$ docker rmi coatisoftware/centos7_64_qt_llvm:<tag>
+$ docker rmi coatisoftware/centos7_32_qt_llvm:<tag>
 
 # docker clean up
 
@@ -32,18 +38,17 @@ $ docker system prune
 
 # build and upload docker images with new <tag> e.g. qt591-llvm500:
 
-$ cd deployment/dockerfiles/linux/centos6_64
-$ docker build -t coatisoftware/centos6_64_qt_llvm:<tag> .
+$ cd deployment/dockerfiles/linux/centos7_64
+$ docker build -t coatisoftware/centos7_64_qt_llvm:<tag> .
 
 $ docker login
-$ docker push coatisoftware/centos6_64_qt_llvm:<tag>
+$ docker push coatisoftware/centos7_64_qt_llvm:<tag>
 
-$ cd ../centos6_32
-$ docker build -t coatisoftware/centos6_32_qt_llvm:<tag> .
+$ cd ../centos7_32
+$ docker build -t coatisoftware/centos7_32_qt_llvm:<tag> .
 
-$ docker push coatisoftware/centos6_32_qt_llvm:<tag>
+$ docker push coatisoftware/centos7_32_qt_llvm:<tag>
 
 # update <tag> of linux images in .gitlab-ci.yml
 
 # commit and publish changes
-
diff --git a/deployment/dockerfiles/linux/centos7_64/Dockerfile b/deployment/dockerfiles/linux/centos7_64/Dockerfile
index bd73b965..9dc11dca 100755
--- a/deployment/dockerfiles/linux/centos7_64/Dockerfile
+++ b/deployment/dockerfiles/linux/centos7_64/Dockerfile
@@ -57,18 +57,15 @@ make -j8 install && rm -Rf /qt
 # LLVM/Clang
 ARG LLVM_VERSION=10.0.0
 RUN mkdir -p /llvm && cd /llvm && \
-wget http://llvm.org/releases/${LLVM_VERSION}/llvm-${LLVM_VERSION}.src.tar.xz && \
-tar xvf llvm-${LLVM_VERSION}.src.tar.xz && \
-cd llvm-${LLVM_VERSION}.src && \
-cd tools && \
-wget http://llvm.org/releases/${LLVM_VERSION}/cfe-${LLVM_VERSION}.src.tar.xz && \
-tar xvf cfe-${LLVM_VERSION}.src.tar.xz && \
+wget https://github.com/llvm/llvm-project/releases/download/llvmorg-${LLVM_VERSION}/llvm-project-${LLVM_VERSION}.tar.xz && \
+tar xvf llvm-project-${LLVM_VERSION}.tar.xz && \
+cd llvm-project-${LLVM_VERSION} && \
 . /opt/rh/python27/enable && \
 . /opt/rh/devtoolset-7/enable && \
-python --version && \
-cd /llvm/llvm-${LLVM_VERSION}.src && mkdir -p build && cd build && \
-cmake .. -DCMAKE_INSTALL_PREFIX=/opt/llvm/ \
+mkdir -p build && cd build && \
+cmake ../llvm -DCMAKE_INSTALL_PREFIX=/opt/llvm/ \
 -DCMAKE_BUILD_TYPE=Release \
+-DLLVM_ENABLE_PROJECTS="clang" \
 -DLLVM_ENABLE_RTTI=ON \
 && make -j8 install && rm -Rf /llvm
 
diff --git a/deployment/dockerfiles/linux/travis_ci/Dockerfile b/deployment/dockerfiles/linux/travis_ci/Dockerfile
index 0f1d3a4b..2946b85f 100644
--- a/deployment/dockerfiles/linux/travis_ci/Dockerfile
+++ b/deployment/dockerfiles/linux/travis_ci/Dockerfile
@@ -1,21 +1,5 @@
 FROM coatisoftware/centos7_64_qt_llvm:qt5126-llvm1000
 
-# TODO: remove after full image rebuilt ------------------------------------
-USER root
-
-RUN yum -y install file
-
-RUN wget https://github.com/probonopd/linuxdeployqt/releases/download/6/linuxdeployqt-6-x86_64.AppImage && \
-chmod a+x linuxdeployqt-6-x86_64.AppImage && \
-./linuxdeployqt-6-x86_64.AppImage --appimage-extract && \
-cp -r squashfs-root/usr/ /opt/linuxdeployqt && \
-chmod -R 755 /opt/linuxdeployqt && \
-rm linuxdeployqt-6-x86_64.AppImage && rm -rf squashfs-root
-ENV PATH=/opt/linuxdeployqt/bin:${PATH}
-
-USER builder
-# --------------------------------------------------------------------------
-
 COPY entrypoint.sh /entrypoint.sh
 
 ENTRYPOINT ["/entrypoint.sh"]