diff --git a/.cargo/config.offline b/.cargo/config.offline
index a6339df37..4cf297a1b 100644
--- a/.cargo/config.offline
+++ b/.cargo/config.offline
@@ -1,5 +1,10 @@
 [source.crates-io]
 replace-with = "vendored-sources"
 
+[source."https://github.com/ebfull/ed25519-zebra"]
+git = "https://github.com/ebfull/ed25519-zebra"
+rev = "8c97acde89b6446f7f2505069fc7b9ac3a541417"
+replace-with = "vendored-sources"
+
 [source.vendored-sources]
 # The directory for this source is set to RUST_VENDORED_SOURCES by src/Makefile.am