diff --git a/.gitignore b/.gitignore
index a224e6b..07134f8 100644
--- a/.gitignore
+++ b/.gitignore
@@ -90,3 +90,4 @@ ENV/
 
 # Rope project settings
 .ropeproject
+.envrc
diff --git a/requirements-python2.txt b/requirements-python2.txt
new file mode 100644
index 0000000..3edf991
--- /dev/null
+++ b/requirements-python2.txt
@@ -0,0 +1,23 @@
+arrow==0.15.6
+backports.functools-lru-cache==1.6.1
+biopython==1.76
+boto3==1.13.10
+botocore==1.16.10
+bz2file==0.98
+certifi==2020.4.5.1
+chardet==3.0.4
+ConfigArgParse==1.2.3
+docutils==0.15.2
+futures==3.3.0
+gensim==3.8.3
+idna==2.9
+jmespath==0.10.0
+Logbook==1.5.3
+numpy==1.16.1
+python-dateutil==2.8.1
+requests==2.23.0
+s3transfer==0.3.3
+scipy==1.2.3
+six==1.14.0
+smart-open==1.10.1
+urllib3==1.25.9
diff --git a/requirements.txt b/requirements.txt
index 14b5c6a..a8c1102 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,20 +1,38 @@
-arrow==0.8.0
-biopython==1.68
-boto==2.46.1
+appdirs==1.4.4
+arrow==0.15.6
+attrs==19.3.0
+biopython==1.76
+boto==2.49.0
+boto3==1.13.23
+botocore==1.16.23
 bz2file==0.98
-ConfigArgParse==0.11.0
-gensim==0.13.2
-Logbook==1.0.0
-numpy==1.16
-pep8==1.7.0
-pluggy==0.4.0
-py==1.4.33
-pytest==3.0.7
-python-dateutil==2.6.0
-requests==2.20.0
-scipy==0.19.0
-six==1.10.0
-smart-open==1.5.1
-tox==2.7.0
-tox-pyenv==1.0.3
-virtualenv==15.1.0
+certifi==2020.4.5.1
+chardet==3.0.4
+ConfigArgParse==1.2.3
+distlib==0.3.0
+docutils==0.15.2
+filelock==3.0.12
+gensim==3.8.3
+idna==2.9
+jmespath==0.10.0
+Logbook==1.5.3
+more-itertools==8.3.0
+numpy==1.18.1
+packaging==20.4
+pep8==1.7.1
+pluggy==0.13.1
+py==1.8.1
+pyparsing==2.4.7
+pytest==5.4.2
+python-dateutil==2.8.1
+requests==2.23.0
+s3transfer==0.3.3
+scipy==1.4.1
+six==1.14.0
+smart-open==2.0.0
+toml==0.10.1
+tox==3.15.0
+tox-pyenv==1.1.0
+urllib3==1.25.9
+virtualenv==20.0.20
+wcwidth==0.2.3