diff --git a/compose/cli/log_printer.py b/compose/cli/log_printer.py
index 9c37cccee..77fa49ae3 100644
--- a/compose/cli/log_printer.py
+++ b/compose/cli/log_printer.py
@@ -39,9 +39,12 @@ class LogPrinter(object):
         color_fns = cycle(colors.rainbow())
         generators = []
 
+        def no_color(text):
+            return text
+
         for container in self.containers:
             if monochrome:
-                color_fn = lambda s: s
+                color_fn = no_color
             else:
                 color_fn = color_fns.next()
             generators.append(self._make_log_generator(container, color_fn))
diff --git a/compose/project.py b/compose/project.py
index 028c6a966..601604474 100644
--- a/compose/project.py
+++ b/compose/project.py
@@ -15,7 +15,8 @@ def sort_service_dicts(services):
     temporary_marked = set()
     sorted_services = []
 
-    get_service_names = lambda links: [link.split(':')[0] for link in links]
+    def get_service_names(links):
+        return [link.split(':')[0] for link in links]
 
     def visit(n):
         if n['name'] in temporary_marked:
diff --git a/requirements-dev.txt b/requirements-dev.txt
index bd5a39493..7b529623f 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -1,5 +1,6 @@
 mock >= 1.0.1
-nose
+nose==1.3.4
 git+https://github.com/pyinstaller/pyinstaller.git@12e40471c77f588ea5be352f7219c873ddaae056#egg=pyinstaller
-unittest2
-flake8
+unittest2==0.8.0
+flake8==2.3.0
+pep8==1.6.1