diff --git a/requirements/edx-sandbox/base.txt b/requirements/edx-sandbox/base.txt
index 1eadd62686..33b030e667 100644
--- a/requirements/edx-sandbox/base.txt
+++ b/requirements/edx-sandbox/base.txt
@@ -19,7 +19,7 @@ lxml==3.8.0
 markupsafe==1.1.1
 matplotlib==1.3.1
 networkx==1.7
-nltk==3.4.1
+nltk==3.4.2
 nose==1.3.7               # via matplotlib
 numpy==1.6.2
 pycparser==2.19
diff --git a/requirements/edx-sandbox/shared.txt b/requirements/edx-sandbox/shared.txt
index d72caefc73..32a7137c0b 100644
--- a/requirements/edx-sandbox/shared.txt
+++ b/requirements/edx-sandbox/shared.txt
@@ -11,7 +11,7 @@ enum34==1.1.6             # via cryptography
 ipaddress==1.0.22         # via cryptography
 lxml==3.8.0
 networkx==1.7
-nltk==3.4.1
+nltk==3.4.2
 pycparser==2.19           # via cffi
 singledispatch==3.4.0.3   # via nltk
 six==1.11.0               # via cryptography, nltk, singledispatch
diff --git a/requirements/edx/base.txt b/requirements/edx/base.txt
index 25cbd7ea23..a366b59a89 100644
--- a/requirements/edx/base.txt
+++ b/requirements/edx/base.txt
@@ -163,7 +163,7 @@ mpmath==1.1.0             # via sympy
 mysqlclient==1.4.2.post1
 networkx==1.7
 newrelic==4.20.0.120
-nltk==3.4.1
+nltk==3.4.2
 nodeenv==1.1.1
 numpy==1.16.4
 oauth2==1.9.0.post1
diff --git a/requirements/edx/development.txt b/requirements/edx/development.txt
index 3359652c4c..5b237e4a36 100644
--- a/requirements/edx/development.txt
+++ b/requirements/edx/development.txt
@@ -209,7 +209,7 @@ mpmath==1.1.0
 mysqlclient==1.4.2.post1
 networkx==1.7
 newrelic==4.20.0.120
-nltk==3.4.1
+nltk==3.4.2
 nodeenv==1.1.1
 numpy==1.16.4
 oauth2==1.9.0.post1
diff --git a/requirements/edx/testing.txt b/requirements/edx/testing.txt
index 567edbe818..5c979d3781 100644
--- a/requirements/edx/testing.txt
+++ b/requirements/edx/testing.txt
@@ -202,7 +202,7 @@ mpmath==1.1.0
 mysqlclient==1.4.2.post1
 networkx==1.7
 newrelic==4.20.0.120
-nltk==3.4.1
+nltk==3.4.2
 nodeenv==1.1.1
 numpy==1.16.4
 oauth2==1.9.0.post1