diff --git a/modules/attestation-report/src/report.rs b/modules/attestation-report/src/report.rs
index 51d333c6..d422fdba 100644
--- a/modules/attestation-report/src/report.rs
+++ b/modules/attestation-report/src/report.rs
@@ -88,7 +88,7 @@ pub struct EndorsedAttestationVerificationReport {
 
 impl EndorsedAttestationVerificationReport {
     pub fn get_avr(&self) -> Result<AttestationVerificationReport, Error> {
-        serde_json::from_slice(self.avr.as_bytes()).map_err(Error::serde_json)
+        serde_json::from_slice(self.avr.as_ref()).map_err(Error::serde_json)
     }
 }
 
diff --git a/modules/attestation-report/src/verification.rs b/modules/attestation-report/src/verification.rs
index e0685bf1..84485a77 100644
--- a/modules/attestation-report/src/verification.rs
+++ b/modules/attestation-report/src/verification.rs
@@ -71,7 +71,7 @@ pub fn verify_report(
     report_cert
         .verify_signature(
             &webpki::RSA_PKCS1_2048_8192_SHA256,
-            report.avr.as_bytes(),
+            report.avr.as_ref(),
             &report.signature,
         )
         .map_err(|e| Error::web_pki(e.to_string()))?;
diff --git a/modules/lcp-client/src/errors.rs b/modules/lcp-client/src/errors.rs
index 56f487b4..773f5245 100644
--- a/modules/lcp-client/src/errors.rs
+++ b/modules/lcp-client/src/errors.rs
@@ -58,7 +58,11 @@ define_error! {
 
         IbcProto
         [TraceError<light_client::types::proto::protobuf::Error>]
-        |_| { "IBCProto error" }
+        |_| { "IBCProto error" },
+
+        StringFromUtf8Error
+        [TraceError<alloc::string::FromUtf8Error>]
+        |_| { "FromUtf8 error" },
     }
 }
 
@@ -91,3 +95,9 @@ impl From<light_client::commitments::Error> for Error {
         Self::commitment_proof(value)
     }
 }
+
+impl From<alloc::string::FromUtf8Error> for Error {
+    fn from(value: alloc::string::FromUtf8Error) -> Self {
+        Self::string_from_utf8_error(value)
+    }
+}
diff --git a/modules/lcp-client/src/message.rs b/modules/lcp-client/src/message.rs
index 881d0dcd..4352819c 100644
--- a/modules/lcp-client/src/message.rs
+++ b/modules/lcp-client/src/message.rs
@@ -67,7 +67,7 @@ impl TryFrom<RawRegisterEnclaveKeyMessage> for RegisterEnclaveKeyMessage {
     fn try_from(value: RawRegisterEnclaveKeyMessage) -> Result<Self, Self::Error> {
         Ok(RegisterEnclaveKeyMessage {
             report: EndorsedAttestationVerificationReport {
-                avr: value.report,
+                avr: String::from_utf8(value.report)?,
                 signature: value.signature,
                 signing_cert: value.signing_cert,
             },
@@ -80,7 +80,7 @@ impl TryFrom<RawRegisterEnclaveKeyMessage> for RegisterEnclaveKeyMessage {
 impl From<RegisterEnclaveKeyMessage> for RawRegisterEnclaveKeyMessage {
     fn from(value: RegisterEnclaveKeyMessage) -> Self {
         RawRegisterEnclaveKeyMessage {
-            report: (&value.report.avr).try_into().unwrap(),
+            report: value.report.avr.into_bytes(),
             signature: value.report.signature,
             signing_cert: value.report.signing_cert,
             operator_signature: value.operator_signature.unwrap_or_default(),
diff --git a/proto/definitions/ibc/lightclients/lcp/v1/lcp.proto b/proto/definitions/ibc/lightclients/lcp/v1/lcp.proto
index e4e98bf8..d9e52489 100644
--- a/proto/definitions/ibc/lightclients/lcp/v1/lcp.proto
+++ b/proto/definitions/ibc/lightclients/lcp/v1/lcp.proto
@@ -13,7 +13,7 @@ message UpdateClientMessage {
 }
 
 message RegisterEnclaveKeyMessage {
-  string report = 1;
+  bytes report = 1;
   bytes signature = 2;
   bytes signing_cert = 3;
   bytes operator_signature = 4;
diff --git a/proto/src/descriptor.bin b/proto/src/descriptor.bin
index d1334fd8..cf8cc629 100644
Binary files a/proto/src/descriptor.bin and b/proto/src/descriptor.bin differ
diff --git a/proto/src/prost/ibc.lightclients.lcp.v1.rs b/proto/src/prost/ibc.lightclients.lcp.v1.rs
index 1f4f2518..8a24045e 100644
--- a/proto/src/prost/ibc.lightclients.lcp.v1.rs
+++ b/proto/src/prost/ibc.lightclients.lcp.v1.rs
@@ -9,8 +9,8 @@ pub struct UpdateClientMessage {
 #[allow(clippy::derive_partial_eq_without_eq)]
 #[derive(Clone, PartialEq, ::prost::Message)]
 pub struct RegisterEnclaveKeyMessage {
-    #[prost(string, tag = "1")]
-    pub report: ::prost::alloc::string::String,
+    #[prost(bytes = "vec", tag = "1")]
+    pub report: ::prost::alloc::vec::Vec<u8>,
     #[prost(bytes = "vec", tag = "2")]
     pub signature: ::prost::alloc::vec::Vec<u8>,
     #[prost(bytes = "vec", tag = "3")]