diff --git a/src/dexorder/event_handler.py b/src/dexorder/event_handler.py
index 2859b7d..06f2137 100644
--- a/src/dexorder/event_handler.py
+++ b/src/dexorder/event_handler.py
@@ -215,7 +215,7 @@ async def activate_time_triggers():
     now = current_block.get().timestamp
     log.debug(f'activating time triggers')
     # time triggers
-    for tt in time_triggers:
+    for tt in tuple(time_triggers):
         await maywait(tt(now))
 
 async def activate_price_triggers():
@@ -223,14 +223,14 @@ async def activate_price_triggers():
     pools_triggered = set()
     for pool, price in new_pool_prices.items():
         pools_triggered.add(pool)
-        for pt in price_triggers[pool]:
+        for pt in tuple(price_triggers[pool]):
             await maywait(pt(price))
     for pool, triggers in new_price_triggers.items():
         if pool not in pools_triggered:
             price = pool_prices[pool]
             for pt in triggers:
                 await maywait(pt(price))
-    for t in unconstrained_price_triggers:
+    for t in tuple(unconstrained_price_triggers):
         # noinspection PyTypeChecker
         await maywait(t(None))