diff --git a/conda/artiq-dev/meta.yaml b/conda/artiq-dev/meta.yaml
index ada52d366..53df8cb45 100644
--- a/conda/artiq-dev/meta.yaml
+++ b/conda/artiq-dev/meta.yaml
@@ -16,7 +16,7 @@ requirements:
     - setuptools 33.1.1
     - migen 0.5.dev py_143+git2e53295
     - misoc 0.6.dev py_64+git7d9e6057
-    - jesd204b 0.3
+    - jesd204b 0.4
     - binutils-or1k-linux >=2.27
     - llvm-or1k
     - llvmlite-artiq 0.12.0.dev py35_30