diff --git a/common/lib/calc/setup.py b/common/lib/calc/setup.py
index e072e44a9a..b4f97e5f16 100644
--- a/common/lib/calc/setup.py
+++ b/common/lib/calc/setup.py
@@ -6,7 +6,7 @@ setup(
     packages=["calc"],
     install_requires=[
         "pyparsing==2.0.1",
-        "numpy",
-        "scipy"
+        "numpy==1.6.2",
+        "scipy==0.14.0",
     ],
 )
diff --git a/common/lib/chem/setup.py b/common/lib/chem/setup.py
index a082462768..c15c026197 100644
--- a/common/lib/chem/setup.py
+++ b/common/lib/chem/setup.py
@@ -6,8 +6,8 @@ setup(
     packages=["chem"],
     install_requires=[
         "pyparsing==2.0.1",
-        "numpy",
-        "scipy",
-        "nltk<3.0",
+        "numpy==1.6.2",
+        "scipy==0.14.0",
+        "nltk==2.0.6",
     ],
 )
diff --git a/common/lib/symmath/setup.py b/common/lib/symmath/setup.py
index 5aa81f09bf..113b809191 100644
--- a/common/lib/symmath/setup.py
+++ b/common/lib/symmath/setup.py
@@ -5,6 +5,6 @@ setup(
     version="0.1",
     packages=["symmath"],
     install_requires=[
-        "sympy",
+        "sympy==0.7.1",
     ],
 )