diff --git a/conda/artiq-kc705-phaser/meta.yaml b/conda/artiq-kc705-phaser/meta.yaml
index 3d8d0f5ed..bb6c61096 100644
--- a/conda/artiq-kc705-phaser/meta.yaml
+++ b/conda/artiq-kc705-phaser/meta.yaml
@@ -12,8 +12,8 @@ build:
 
 requirements:
   build:
-    - migen 0.4
-    - misoc 0.4
+    - migen 0.5.dev
+    - misoc 0.5.dev
     - jesd204b 0.2
     - llvm-or1k
     - binutils-or1k-linux >=2.27