diff --git a/recipes/unicycler/meta.yaml b/recipes/unicycler/meta.yaml
index a39a8e16708e1..43aad9d899c9c 100644
--- a/recipes/unicycler/meta.yaml
+++ b/recipes/unicycler/meta.yaml
@@ -13,7 +13,7 @@ source:
       - misc.py.patch
 
 build:
-  number: 1
+  number: 2
   skip: True  # [py<34 or osx]
 
 requirements:
@@ -27,7 +27,7 @@ requirements:
     - zlib
   run:
     - python
-    - spades >=3.15.3
+    - spades >=3.15.4
     - blast
     - racon
     - miniasm