diff --git a/web/backup-client-wasm/Cargo.lock b/web/backup-client-wasm/Cargo.lock
--- a/web/backup-client-wasm/Cargo.lock
+++ b/web/backup-client-wasm/Cargo.lock
@@ -95,6 +95,7 @@
 version = "0.1.0"
 dependencies = [
  "backup_client",
+ "getrandom",
 ]
 
 [[package]]
diff --git a/web/backup-client-wasm/Cargo.toml b/web/backup-client-wasm/Cargo.toml
--- a/web/backup-client-wasm/Cargo.toml
+++ b/web/backup-client-wasm/Cargo.toml
@@ -7,6 +7,7 @@
 crate-type = ["cdylib"]
 
 [dependencies]
+getrandom = { version = "0.2", features = ["js"] }
 backup_client = { path = "../../shared/backup_client", default-features = false }
 
 # Optimize for small code size