diff --git a/requirements/ci.txt b/requirements/ci.txt
index c91537a..6dbb6b6 100644
--- a/requirements/ci.txt
+++ b/requirements/ci.txt
@@ -1,2 +1,2 @@
-codecov==1.1.8
-tox==1.9.2
+codecov==2.0.5
+tox==2.6.0
diff --git a/requirements/dev.txt b/requirements/dev.txt
index 0cf3a36..763695a 100644
--- a/requirements/dev.txt
+++ b/requirements/dev.txt
@@ -1,6 +1,6 @@
 bumpversion==0.5.3
-flake8==2.4.0
-isort==3.9.6
+flake8==3.3.0
+isort==4.2.5
 # Newer versions of pdbpp do not work with Python 3
 # See https://bitbucket.org/antocuni/pdb/issue/45/fails-to-install-on-os-x-1010-python-343
-pdbpp==0.8.1
+pdbpp==0.8.3
diff --git a/requirements/rtd.txt b/requirements/rtd.txt
index c2d3eae..b2c863b 100644
--- a/requirements/rtd.txt
+++ b/requirements/rtd.txt
@@ -1 +1 @@
-releases==0.7.0
+releases==1.3.0
diff --git a/setup.py b/setup.py
index 8631060..fc65d03 100755
--- a/setup.py
+++ b/setup.py
@@ -12,8 +12,8 @@ def read(*paths):
         return f.read()
 
 docs_requires = [
-    'Sphinx==1.3.1',
-    'releases==0.7.0',
+    'Sphinx==1.5.3',
+    'releases==1.3.0',
 ]
 
 requires = [
@@ -22,13 +22,13 @@ def read(*paths):
 ]
 
 tests_requires = [
-    'coverage==3.7.1',
+    'coverage==4.3.4',
     'httpretty>=0.8.0,!=0.8.1,!=0.8.2,!=0.8.3,!=0.8.7,!=0.8.8,!=0.8.9',
     'pytest-httpretty==0.2.0',
-    'pytest==2.7.0',
-    'python-dateutil==2.4.2',
-    'six==1.9.0',
-    'tox==1.9.2',
+    'pytest==3.0.6',
+    'python-dateutil==2.6.0',
+    'six==1.10.0',
+    'tox==2.6.0',
     'virtualenv>=12.0.2,!=12.0.4,!=12.0.5,!=12.0.6,!=12.0.7',
 ]
 
diff --git a/tox.ini b/tox.ini
index d860142..2431e20 100644
--- a/tox.ini
+++ b/tox.ini
@@ -14,7 +14,7 @@ basepython = python3.4
 commands =
     flake8 setup.py durga/ tests/
 deps =
-    flake8==2.4.0
+    flake8==3.3.0
 skip_install = True
 
 [testenv:isort]
@@ -22,7 +22,7 @@ basepython = python3.4
 commands =
     isort --check-only --recursive --verbose setup.py durga tests
 deps =
-    isort==3.9.6
+    isort==4.2.5
 skip_install = True
 
 [testenv:manifest]
@@ -30,7 +30,7 @@ basepython = python3.4
 commands =
     check-manifest
 deps =
-    check-manifest==0.24
+    check-manifest==0.35
 skip_install = True
 
 [testenv:docs]
@@ -41,4 +41,4 @@ commands =
     make -C docs linkcheck BUILDDIR={envtmpdir}
     doc8
 deps =
-    doc8==0.6.0
+    doc8==0.7.0