diff --git a/requirements/edx/base.txt b/requirements/edx/base.txt
index 22fd6a35b169..c18d66aca537 100644
--- a/requirements/edx/base.txt
+++ b/requirements/edx/base.txt
@@ -604,8 +604,10 @@ html5lib==1.1
     # via
     #   -r requirements/edx/base.in
     #   ora2
-icalendar==5.0.4
-    # via -r requirements/edx/base.in
+icalendar==5.0.1
+    # via
+    #   -c requirements/edx/../constraints.txt
+    #   -r requirements/edx/base.in
 idna==3.4
     # via
     #   -r requirements/edx/paver.txt
diff --git a/requirements/edx/development.txt b/requirements/edx/development.txt
index f57157a6c7bb..7b2b915efbf1 100644
--- a/requirements/edx/development.txt
+++ b/requirements/edx/development.txt
@@ -774,8 +774,10 @@ html5lib==1.1
     #   ora2
 httpretty==1.1.4
     # via -r requirements/edx/testing.txt
-icalendar==5.0.4
-    # via -r requirements/edx/testing.txt
+icalendar==5.0.1
+    # via
+    #   -c requirements/edx/../constraints.txt
+    #   -r requirements/edx/testing.txt
 idna==3.4
     # via
     #   -r requirements/edx/testing.txt
diff --git a/requirements/edx/testing.txt b/requirements/edx/testing.txt
index 775055a3de5f..733e55e068ea 100644
--- a/requirements/edx/testing.txt
+++ b/requirements/edx/testing.txt
@@ -742,8 +742,10 @@ html5lib==1.1
     #   ora2
 httpretty==1.1.4
     # via -r requirements/edx/testing.in
-icalendar==5.0.4
-    # via -r requirements/edx/base.txt
+icalendar==5.0.1
+    # via
+    #   -c requirements/edx/../constraints.txt
+    #   -r requirements/edx/base.txt
 idna==3.4
     # via
     #   -r requirements/edx/base.txt