diff --git a/silkaj/constants.py b/silkaj/constants.py
index 9d598dbaaabb1cc77db96a0cd699cb81aeabb3dc..207999faad08e0d168aabcf8aa6b831143b38994 100644
--- a/silkaj/constants.py
+++ b/silkaj/constants.py
@@ -21,7 +21,7 @@ GTEST_SYMBOL = "ÄžTest"
 G1_DEFAULT_ENDPOINT = "g1.duniter.org", "443"
 G1_TEST_DEFAULT_ENDPOINT = "g1-test.duniter.org", "443"
 CONNECTION_TIMEOUT = 10
-ASYNC_SLEEP = 0.1
+ASYNC_SLEEP = 0.15
 SOURCES_PER_TX = 40
 SUCCESS_EXIT_STATUS = 0
 FAILURE_EXIT_STATUS = 1