diff --git a/pyfa.py b/pyfa.py
index 939393a99..691a9c177 100755
--- a/pyfa.py
+++ b/pyfa.py
@@ -24,6 +24,7 @@ import platform
 import re
 import sys
 import traceback
+from imp import find_module
 from optparse import AmbiguousOptionError, BadOptionError, OptionParser
 
 from logbook import CRITICAL, DEBUG, ERROR, FingersCrossedHandler, INFO, Logger, NestedSetup, NullHandler, StreamHandler, TimedRotatingFileHandler, WARNING, \
@@ -122,7 +123,8 @@ def handleGUIException(exc_type, exc_value, exc_traceback):
             if wx and ErrorFrame:
                 pyfa_gui = wx.App(False)
                 if exc_type == PreCheckException:
-                    ErrorFrame(exc_value, None, "Missing Prerequisite")
+                    msgbox = wx.MessageBox(exc_value.message, 'Error', wx.ICON_ERROR | wx.STAY_ON_TOP)
+                    msgbox.ShowModal()
                 else:
                     ErrorFrame(exc_value, tb)
 
@@ -144,7 +146,8 @@ def handleGUIException(exc_type, exc_value, exc_traceback):
         if wx and ErrorFrame:
             pyfa_gui = wx.App(False)
             if exc_type == PreCheckException:
-                ErrorFrame(exc_value, None, "Missing Prerequisite")
+                msgbox = wx.MessageBox(exc_value.message, 'Error', wx.ICON_ERROR | wx.STAY_ON_TOP)
+                msgbox.ShowModal()
             else:
                 ErrorFrame(exc_value, tb)
 
@@ -352,6 +355,20 @@ if __name__ == "__main__":
             else:
                 pyfalog.warning("Unknown sqlalchemy version string format, skipping check. Version: {0}", sqlalchemy.__version__)
 
+        requirements_path = os.path.join(config.pyfaPath, "requirements.txt")
+        if os.path.exists(requirements_path):
+            file = open(requirements_path, "r")
+            for requirement in file:
+                requirement = requirement.replace("\n", "")
+                requirement_parsed = requirement.split(' ')
+                if requirement_parsed:
+                    try:
+                        find_module(requirement_parsed[0])
+                    except ImportError as e:
+                        pyfalog.warning("Possibly missing required module: {0}", requirement_parsed[0])
+                        if len(requirement_parsed) == 3:
+                            pyfalog.warning("Recommended version {0} {1}", requirement_parsed[1], requirement_parsed[2])
+
         import eos.db
         # noinspection PyUnresolvedReferences
         import service.prefetch  # noqa: F401
@@ -364,9 +381,11 @@ if __name__ == "__main__":
 
         from gui.mainFrame import MainFrame
 
+
+        test = 1/0
+
         pyfa = wx.App(False)
         MainFrame(options.title)
-        test = 1/0
         pyfa.MainLoop()
 
         # TODO: Add some thread cleanup code here. Right now we bail, and that can lead to orphaned threads or threads not properly exiting.
diff --git a/requirements.txt b/requirements.txt
index d3bc33dde..cac9199c4 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,7 +1,7 @@
-logbook>=1.0.0
+logbook >= 1.0.0
 matplotlib
-PyYAML
+PyYAML >= 3.12
 python-dateutil
 urllib3
-requests==2.11.1
-sqlalchemy>=1.0.5
+requests == 2.11.1
+sqlalchemy >= 1.0.5
diff --git a/requirements_build_linux.txt b/requirements_build_linux.txt
index 3a4640baf..28f42aa34 100644
--- a/requirements_build_linux.txt
+++ b/requirements_build_linux.txt
@@ -2,7 +2,7 @@ PyInstaller >= 3.2.1
 cycler >= 0.10.0
 functools32 >= 3.2.3
 future >= 0.16.0
-numpy >= 1.12.
+numpy >= 1.12
 pyparsing >= 2.1.10
 pytz >= 2016.10
 six
diff --git a/requirements_build_OSx.txt b/requirements_build_osx.txt
similarity index 90%
rename from requirements_build_OSx.txt
rename to requirements_build_osx.txt
index 51f6135fd..67b64e480 100644
--- a/requirements_build_OSx.txt
+++ b/requirements_build_osx.txt
@@ -2,7 +2,7 @@ PyInstaller	>= 3.2.1
 cycler >= 0.10.0
 functools32 >= 3.2.3
 future >= 0.16.0
-numpy >= 1.12.
+numpy >= 1.12
 pyparsing >= 2.1.10
 pypiwin32 >= 219
 pytz >= 2016.10
diff --git a/requirements_build_windows.txt b/requirements_build_windows.txt
index 173ce92d0..c25a341af 100644
--- a/requirements_build_windows.txt
+++ b/requirements_build_windows.txt
@@ -2,7 +2,7 @@ PyInstaller	>= 3.2.1
 cycler >= 0.10.0
 functools32 >= 3.2.3
 future >= 0.16.0
-numpy >= 1.12.
+numpy >= 1.12
 pyparsing >= 2.1.10
 pypiwin32 >= 219
 pytz >= 2016.10
diff --git a/requirements_test.txt b/requirements_test.txt
index 33f8973cd..50191648d 100644
--- a/requirements_test.txt
+++ b/requirements_test.txt
@@ -1,8 +1,8 @@
-pytest==3.0.3
-pytest-mock==1.2
-pytest-cov==2.3.1
-pytest-capturelog==0.7
-coverage==4.2
-coveralls==1.1
+pytest == 3.0.3
+pytest-mock == 1.2
+pytest-cov == 2.3.1
+pytest-capturelog == 0.7
+coverage == 4.2
+coveralls == 1.1
 codecov
 tox