diff --git a/.CI/travis/install_linux.sh b/.CI/travis/install_linux.sh
index ce246c1..58267fb 100644
--- a/.CI/travis/install_linux.sh
+++ b/.CI/travis/install_linux.sh
@@ -13,7 +13,7 @@ sudo pip3 install conan==1.6.1
 
 if ! [[ -z "${TRAVIS_TAG}" ]]; then
   sudo apt-get install -y doxygen graphviz
-  sudo pip3 install sphinx breathe sphinx_rtd_theme
+  sudo pip3 install sphinx==1.8.3 breathe sphinx_rtd_theme
 fi
 
 # Installing library dependencies with conan
diff --git a/.CI/travis/install_osx.sh b/.CI/travis/install_osx.sh
index 871f469..f6094d8 100644
--- a/.CI/travis/install_osx.sh
+++ b/.CI/travis/install_osx.sh
@@ -23,7 +23,7 @@ pip${PYTHON_VERSION} install conan
 
 if ! [[ -z "${TRAVIS_TAG}" ]]; then
   brew install doxygen graphviz
-  pip${PYTHON_VERSION} install sphinx breathe sphinx_rtd_theme
+  pip${PYTHON_VERSION} install sphinx==1.8.3 breathe sphinx_rtd_theme
 fi
 
 # Installing library dependencies with conan