diff --git a/enclave-runtime/Cargo.toml b/enclave-runtime/Cargo.toml
index 06ab8bd6b8..024ad2c2a6 100644
--- a/enclave-runtime/Cargo.toml
+++ b/enclave-runtime/Cargo.toml
@@ -52,7 +52,7 @@ sp-io = { default-features = false, features = ["disable_oom", "disable_panic_ha
 substrate-api-client = { default-features = false, git = "https://github.com/scs/substrate-api-client", branch = "master" }
 sgx-externalities = { default-features = false, git = "https://github.com/integritee-network/sgx-runtime", branch = "master" }
 jsonrpc-core = { default-features = false, git = "https://github.com/scs/jsonrpc", branch = "no_std" }
-substrate-fixed = { git = "https://github.com/encointer/substrate-fixed", branch = "master" }
+substrate-fixed = { package = "substrate-fixed", git = "https://github.com/encointer/substrate-fixed",tag = "v0.5.6"}
 
 # mesalock
 linked-hash-map = { git = "https://github.com/mesalock-linux/linked-hash-map-sgx" }
diff --git a/service/Cargo.toml b/service/Cargo.toml
index 692a39cc13..9cdac7a06d 100644
--- a/service/Cargo.toml
+++ b/service/Cargo.toml
@@ -54,7 +54,7 @@ ita-stf = { path = "../app-libs/stf" }
 # scs / integritee
 substrate-api-client = { git = "https://github.com/scs/substrate-api-client", branch = "master" }
 my-node-runtime = { package = "integritee-node-runtime", git = "https://github.com/integritee-network/integritee-node", branch = "master" }
-substrate-fixed = { git = "https://github.com/encointer/substrate-fixed", branch = "master" }
+substrate-fixed = { package = "substrate-fixed", git = "https://github.com/encointer/substrate-fixed", tag = "v0.5.6" }
 
 # Substrate dependencies
 sp-runtime = { version = "4.0.0-dev", git = "https://github.com/paritytech/substrate.git", branch = "master" }