diff --git a/sdk/src/wasm/rsa_wasm_signer.rs b/sdk/src/wasm/rsa_wasm_signer.rs
index 16d6aed33..fcfaae89c 100644
--- a/sdk/src/wasm/rsa_wasm_signer.rs
+++ b/sdk/src/wasm/rsa_wasm_signer.rs
@@ -120,6 +120,135 @@ impl Signer for RsaWasmSigner {
     }
 }
 
+// If "../../tests/fixtures/certs/rs256.pub" or "../../tests/fixtures/certs/rs256.pem") change
+// CHAIN_BYTES and KEY_BYTES should be updated here.
+// We embed the certs here because WASM cannot read the fixtures.
+
+const KEY_BYTES: &str = r#"-----BEGIN PRIVATE KEY-----
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+-----END PRIVATE KEY-----
+"#;
+
+const CERT_BYTES: &str = r#"-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+"#;
+
 pub struct RsaWasmSignerAsync {
     signer: Box<dyn Signer>,
 }
@@ -127,8 +256,8 @@ pub struct RsaWasmSignerAsync {
 impl RsaWasmSignerAsync {
     #[allow(dead_code)]
     pub fn new() -> Self {
-        let cert_bytes = include_bytes!("../../tests/fixtures/certs/rs256.pub");
-        let key_bytes = include_bytes!("../../tests/fixtures/certs/rs256.pem");
+        let cert_bytes = CERT_BYTES.as_bytes();
+        let key_bytes = KEY_BYTES.as_bytes();
 
         Self {
             signer: Box::new(
@@ -187,8 +316,8 @@ mod tests {
 
     #[test]
     fn sign_ps256() {
-        let cert_bytes = include_bytes!("../../tests/fixtures/certs/rs256.pub");
-        let key_bytes = include_bytes!("../../tests/fixtures/certs/rs256.pem");
+        let cert_bytes = CERT_BYTES.as_bytes();
+        let key_bytes = KEY_BYTES.as_bytes();
 
         let signer =
             RsaWasmSigner::from_signcert_and_pkey(cert_bytes, key_bytes, SigningAlg::Ps256, None)