fix ssh close session issue

Change-Id: Iae9165e59f60fc675def608e61a123d7b410bbd9
diff --git a/requirements.txt b/requirements.txt
index 2efbb55..1d3b19b 100755
--- a/requirements.txt
+++ b/requirements.txt
@@ -5,7 +5,7 @@
 robotframework-kafkalibrary==0.0.3
 robotframework-lint==1.0
 robotframework-requests==0.7.0
-robotframework-sshlibrary==3.4.0
+robotframework-sshlibrary==3.8.0
 yamllint==1.23.0
 # replace when we can use upstream (needs python 3.6)
 git+https://github.com/zdw/robotframework-importresource@b81b87aabaee0594e966687b41e3674b866f28ee