diff --git a/experiments/cf_simple.py b/experiments/cf_simple.py
index 9e2d7e6..0d56259 100644
--- a/experiments/cf_simple.py
+++ b/experiments/cf_simple.py
@@ -402,6 +402,7 @@ def evolve(
     env_override: str = "",
     birth_override: str = "",
     hazard_override: str = "",
+    gops_params_override: str = "",
     logdir: Path = Path("./log"),
     log_mode: LogMode = LogMode.REWARD_LOG_STATE,
     log_interval: int = 1000,
@@ -424,6 +425,7 @@ def evolve(
     cfconfig.apply_override(env_override)
     bdconfig.apply_birth_override(birth_override)
     bdconfig.apply_hazard_override(hazard_override)
+    gopsconfig.apply_params_override(gops_params_override)
 
     # Load models
     birth_fn, hazard_fn = bdconfig.load_models()
diff --git a/src/emevo/exp_utils.py b/src/emevo/exp_utils.py
index 9d61be9..d90ee38 100644
--- a/src/emevo/exp_utils.py
+++ b/src/emevo/exp_utils.py
@@ -147,6 +147,12 @@ def load_model(self) -> gops.Mutation | gops.Crossover:
                 params[k] = v
         return _load_cls(self.path)(**params)
 
+    def apply_params_override(self, override: str) -> None:
+        if 0 < len(override):
+            override_dict = json.loads(override)
+            for key, value in override_dict.items():
+                self.params[key] = value
+
 
 @chex.dataclass
 class Log: