diff --git a/.travis.yml b/.travis.yml
index 7fe6cc4b3c..fc3360ddf8 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -31,6 +31,8 @@ install:
   - sudo apt-get install -y liboce-ocaf-lite-dev
 
   - sudo apt-get install -y libpcre3-dev
+  
+  - sudo apt-get install -y libcgal-dev libmpfr-dev libgmp-dev
 
 script:
   - pwd
@@ -51,8 +53,8 @@ script:
   - cd cmake
   - mkdir build-ifc2x3 build-ifc4
   - cd build-ifc2x3
-  - cmake -DCOLLADA_SUPPORT=True -DOPENCOLLADA_INCLUDE_DIR=/usr/local/include/opencollada -DOPENCOLLADA_LIBRARY_DIR=/usr/local/lib/opencollada -DPCRE_LIBRARY_DIR=/usr/lib/x86_64-linux-gnu -DUSE_IFC4=False -DBUILD_IFCPYTHON=True -DUNICODE_SUPPORT=True -DOCC_LIBRARY_DIR=/usr/lib/x86_64-linux-gnu  ..
+  - cmake -DCOLLADA_SUPPORT=True -DOPENCOLLADA_INCLUDE_DIR=/usr/local/include/opencollada -DOPENCOLLADA_LIBRARY_DIR=/usr/local/lib/opencollada -DPCRE_LIBRARY_DIR=/usr/lib/x86_64-linux-gnu -DUSE_IFC4=False -DBUILD_IFCPYTHON=True -DUNICODE_SUPPORT=True -DOCC_LIBRARY_DIR=/usr/lib/x86_64-linux-gnu -DGMP_LIBRARY_DIR=/usr/lib/x86_64-linux-gnu/ -DMPFR_LIBRARY_DIR=/usr/lib/x86_64-linux-gnu/ ..
   - make -j IfcConvert
   - cd ../build-ifc4
-  - cmake -DCOLLADA_SUPPORT=True -DOPENCOLLADA_INCLUDE_DIR=/usr/local/include/opencollada -DOPENCOLLADA_LIBRARY_DIR=/usr/local/lib/opencollada -DPCRE_LIBRARY_DIR=/usr/lib/x86_64-linux-gnu -DUSE_IFC4=True -DBUILD_IFCPYTHON=True -DUNICODE_SUPPORT=True -DOCC_LIBRARY_DIR=/usr/lib/x86_64-linux-gnu  ..
+  - cmake -DCOLLADA_SUPPORT=True -DOPENCOLLADA_INCLUDE_DIR=/usr/local/include/opencollada -DOPENCOLLADA_LIBRARY_DIR=/usr/local/lib/opencollada -DPCRE_LIBRARY_DIR=/usr/lib/x86_64-linux-gnu -DUSE_IFC4=True -DBUILD_IFCPYTHON=True -DUNICODE_SUPPORT=True -DOCC_LIBRARY_DIR=/usr/lib/x86_64-linux-gnu -DGMP_LIBRARY_DIR=/usr/lib/x86_64-linux-gnu/ -DMPFR_LIBRARY_DIR=/usr/lib/x86_64-linux-gnu/  ..
   - make -j IfcConvert