diff --git a/.zksolc-version b/.zksolc-version
index b671d40..54a3d96 100644
--- a/.zksolc-version
+++ b/.zksolc-version
@@ -1 +1 @@
-v1.5.5
+v1.5.6
diff --git a/api/src/utils/lib.rs b/api/src/utils/lib.rs
index 9bc5c8e..8e6e890 100644
--- a/api/src/utils/lib.rs
+++ b/api/src/utils/lib.rs
@@ -23,11 +23,11 @@ pub const CARGO_MANIFEST_DIR: &str = env!("CARGO_MANIFEST_DIR");
 
 pub const DURATION_TO_PURGE: u64 = 60 * 5; // 5 minutes
 
-pub const ZKSOLC_VERSIONS: [&str; 3] = ["1.5.5", "1.4.1", "1.4.0"];
+pub const ZKSOLC_VERSIONS: [&str; 3] = ["1.5.6", "1.4.1", "1.4.0"];
 
 pub const DEFAULT_SOLIDITY_VERSION: &str = "0.8.24";
 
-pub const DEFAULT_ZKSOLC_VERSION: &str = "1.5.5";
+pub const DEFAULT_ZKSOLC_VERSION: &str = "1.5.6";
 
 pub const ALLOWED_NETWORKS: [&str; 2] = ["sepolia", "mainnet"];