diff --git a/.buildkite/emscripten.yml b/.buildkite/emscripten.yml
--- a/.buildkite/emscripten.yml
+++ b/.buildkite/emscripten.yml
@@ -1,12 +1,21 @@
 steps:
-  - label: 'Emscripten build'
+  - label: 'Emscripten and Wasmpack build'
     command:
+      - 'curl https://sh.rustup.rs -sSf | sh -s -- -y'
+      - 'source /root/.cargo/env'
+      - 'cargo install wasm-pack'
       - 'apt update && apt install -y autoconf libtool build-essential cmake git'
       - 'cd web'
+      # Emscripten
       - 'BEFORE_HASH=$(sha256sum ./database/_generated/comm_query_executor.wasm)'
       - './scripts/run_emscripten.sh'
       - 'AFTER_HASH=$(sha256sum ./database/_generated/comm_query_executor.wasm)'
       - '[[ "$BEFORE_HASH" == "$AFTER_HASH" ]] || exit 1'
+      # Wasmpack
+      - 'BEFORE_HASH=$(sha256sum ./backup-client-wasm/wasm/backup-client-wasm_bg.wasm)'
+      - './scripts/run_wasmpack.sh'
+      - 'AFTER_HASH=$(sha256sum ./backup-client-wasm/wasm/backup-client-wasm_bg.wasm)'
+      - '[[ "$BEFORE_HASH" == "$AFTER_HASH" ]] || exit 1'
     retry:
       automatic: true
     plugins:
diff --git a/shared/backup_client/src/lib.rs b/shared/backup_client/src/lib.rs
--- a/shared/backup_client/src/lib.rs
+++ b/shared/backup_client/src/lib.rs
@@ -22,7 +22,7 @@
 };
 
 const LOG_DOWNLOAD_RETRY_DELAY: Duration = Duration::from_secs(5);
-const LOG_DOWNLOAD_MAX_RETRY: usize = 3;
+const LOG_DOWNLOAD_MAX_RETRY: usize = 5;
 
 #[cfg(target_arch = "wasm32")]
 use wasm_bindgen::prelude::wasm_bindgen;