diff --git a/hbp_nrp_virtual_coach/requirements.txt b/hbp_nrp_virtual_coach/requirements.txt
index 64768efc55fb761b66084a82d3362a478983ca13..b4ca171ee068402113602218961134eeca6abb6f 100644
--- a/hbp_nrp_virtual_coach/requirements.txt
+++ b/hbp_nrp_virtual_coach/requirements.txt
@@ -1,7 +1,7 @@
 # third-party dependencies
 future
 texttable==0.8.7
-progressbar2==3.34.0
+progressbar2==3.52.1
 httplib2==0.12.1
 pandas==1.0.5
 jupyter==1.0.0
diff --git a/hbp_nrp_virtual_coach/requirements_extension_tests.txt b/hbp_nrp_virtual_coach/requirements_extension_tests.txt
index a8a6bd0ac91e29d306bcbd31604dfc7c1fdb4aaa..c92a04d59d2c67d53c7ed8f0b0a1fb6358278832 100644
--- a/hbp_nrp_virtual_coach/requirements_extension_tests.txt
+++ b/hbp_nrp_virtual_coach/requirements_extension_tests.txt
@@ -1,2 +1,2 @@
 #the following is required for the unit testing
-mock==1.0.1
\ No newline at end of file
+mock==1.0.1; python_version < "3.3"
\ No newline at end of file