diff --git a/requirements.txt b/requirements.txt
index 5515926..bc25c2b 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,8 +1,8 @@
-ptyprocess==0.6.0
-pycoax==0.5.0
-pyserial==3.4
+ptyprocess==0.7.0
+pycoax==0.5.1
+pyserial==3.5
 pyte==0.8.0
-pytn3270==0.6.1
-sliplib==0.5.0
-sortedcontainers==2.1.0
-wcwidth==0.1.7
+pytn3270==0.7.0
+sliplib==0.6.2
+sortedcontainers==2.3.0
+wcwidth==0.2.5