diff --git a/Dockerfile b/Dockerfile
index 76e2c8cd1..dfaf7a151 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -14,7 +14,7 @@ COPY . .
 RUN echo "Building for sgx with taskdb: ${TASKDB}"
 RUN cargo build --release ${BUILD_FLAGS} --features "sgx" --features "docker_build" --features ${TASKDB}
 
-FROM gramineproject/gramine:1.7-jammy AS runtime
+FROM gramineproject/gramine:1.8-jammy AS runtime
 ENV DEBIAN_FRONTEND=noninteractive
 WORKDIR /opt/raiko
 
diff --git a/provers/sgx/config/sgx-guest.docker.manifest.template b/provers/sgx/config/sgx-guest.docker.manifest.template
index 8ec9eb11f..e9464fbcb 100644
--- a/provers/sgx/config/sgx-guest.docker.manifest.template
+++ b/provers/sgx/config/sgx-guest.docker.manifest.template
@@ -45,3 +45,4 @@ sgx.remote_attestation = "dcap"
 sys.enable_extra_runtime_domain_names_conf = true
 sys.insecure__allow_eventfd = true
 sys.stack.size = "8M"
+sgx.enclave_size = "4G"
diff --git a/provers/sgx/config/sgx-guest.local.manifest.template b/provers/sgx/config/sgx-guest.local.manifest.template
index 289b8fc04..bea17e8d4 100644
--- a/provers/sgx/config/sgx-guest.local.manifest.template
+++ b/provers/sgx/config/sgx-guest.local.manifest.template
@@ -45,8 +45,9 @@ sgx.trusted_files = [
   "file:/usr/lib/ssl/certs/",
   "file:sgx-guest",
 ]
-sgx.max_threads = 32
+sgx.max_threads = 512
 sgx.remote_attestation = "dcap"
 sys.enable_extra_runtime_domain_names_conf = true
 sys.insecure__allow_eventfd = true
 sys.stack.size = "8M"
+sgx.enclave_size = "4G"
diff --git a/provers/sgx/prover/src/lib.rs b/provers/sgx/prover/src/lib.rs
index a74ee0e06..334f063f3 100644
--- a/provers/sgx/prover/src/lib.rs
+++ b/provers/sgx/prover/src/lib.rs
@@ -461,7 +461,7 @@ fn parse_sgx_result(output: Vec<u8>) -> ProverResult<SgxResponse, String> {
     Ok(SgxResponse {
         proof: extract_field("proof"),
         quote: extract_field("quote"),
-        input: B256::from_str(&extract_field("input")).unwrap(),
+        input: B256::from_str(&extract_field("input")).unwrap_or_default(),
     })
 }