diff --git a/requirements.txt b/requirements.txt
index cd01f840b879c9e116ca7a2031242fb452397a10..a65be3bc074f03222bd6a99ec6b42935c53e682a 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,3 +1,3 @@
 pretenders
-ucoinpy
+ucoinpy<0.13
 git+https://github.com/Insoleet/quamash.git@sockets_only
\ No newline at end of file