diff --git a/requirements.txt b/requirements.txt
index 47365ee..5589f16 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -9,13 +9,9 @@ cffi==1.9.1               # via cryptography
 contexttimer==0.3.3
 cryptography==1.7.2
 cycler==0.10.0            # via matplotlib
-enum34==1.1.6             # via cryptography
-functools32==3.2.3.post2  # via matplotlib
-futures==3.0.5            # via requests-futures
 gitdb2==2.0.0             # via gitpython
 gitpython==2.1.1
 idna==2.2
-ipaddress==1.0.18         # via cryptography
 matplotlib==2.0.0
 mpld3==0.3
 numpy==1.10.4
@@ -25,14 +21,13 @@ pyopenssl==16.2.0
 pyparsing==2.1.10         # via matplotlib
 python-dateutil==2.5.1
 pytz==2016.4              # via matplotlib
-pyyaml==3.12
+pyyaml==5.1
 requests-futures==0.9.7
 requests==2.13.0
 scipy==0.17.0
 six==1.10.0               # via cryptography, cycler, matplotlib, pyopenssl, python-dateutil
 smmap2==2.0.1             # via gitdb2
-subprocess32==3.2.7       # via matplotlib
 tqdm==4.11.2
 
 # The following packages are considered to be unsafe in a requirements file:
-# setuptools                # via cryptography
+# setuptools