diff --git a/cmake/external/eigen.cmake b/cmake/external/eigen.cmake
index f7483f6be9169eb58f0148cd3a956a8c881e1fe3..0e566b70c0ae9803020ae9a0218e91be89108a00 100644
--- a/cmake/external/eigen.cmake
+++ b/cmake/external/eigen.cmake
@@ -7,7 +7,7 @@ INCLUDE_DIRECTORIES(${EIGEN_SOURCE_DIR}/src/extern_eigen3)
 ExternalProject_Add(
     extern_eigen3
     ${EXTERNAL_PROJECT_LOG_ARGS}
-    GIT_REPOSITORY  "https://github.com/RLovelett/eigen.git"
+    GIT_REPOSITORY  "https://github.com/libigl/eigen.git"
     GIT_TAG         "master"
     PREFIX          ${EIGEN_SOURCE_DIR}
     UPDATE_COMMAND  ""
diff --git a/requirements.txt b/requirements.txt
index c6860c743d55d5198e14787ddc8081e8630e309a..cc713def45f19c69e7c6555d046891c30d0e5e12 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,7 +1,7 @@
 numpy==1.14.0
 recommonmark==0.4.0
 scipy==1.0.0
-Sphinx==1.6.6
+Sphinx==1.5.6
 sphinx-rtd-theme==0.2.4
 flake8==3.5.0
 Pillow==5.0.0