pip-compile -U

requirements.txt

@@ -6,10 +6,11 @@
 #
 beautifulsoup4==4.6.0
 bibtexparser==0.6.2
-certifi==2017.4.17        # via requests
+certifi==2017.7.27.1      # via requests
 chardet==3.0.4            # via requests
-idna==2.5                 # via requests
+futures==3.1.1            # via requests-futures
+idna==2.6                 # via requests
 pathlib==1.0.1
 requests-futures==0.9.7
-requests==2.18.1
-urllib3==1.21.1           # via requests
+requests==2.18.4
+urllib3==1.22             # via requests