diff --git a/ref-farming/src/actions_of_seed.rs b/ref-farming/src/actions_of_seed.rs
index 1f104da..ecc753b 100644
--- a/ref-farming/src/actions_of_seed.rs
+++ b/ref-farming/src/actions_of_seed.rs
@@ -194,6 +194,16 @@ impl Contract {
         }
     }
 
+    pub(crate) fn internal_update_seed_min_deposit(
+        &mut self, 
+        seed_id: &String, 
+        min_deposit: U128) {
+            
+        let mut farm_seed = self.get_seed(&seed_id);
+        farm_seed.get_ref_mut().min_deposit = min_deposit.into();
+        self.data_mut().seeds.insert(&seed_id, &farm_seed);
+    }
+
     pub(crate) fn internal_seed_deposit(
         &mut self, 
         seed_id: &String, 
diff --git a/ref-farming/src/owner.rs b/ref-farming/src/owner.rs
index b684076..85cf37f 100644
--- a/ref-farming/src/owner.rs
+++ b/ref-farming/src/owner.rs
@@ -17,8 +17,7 @@ impl Contract {
 
     pub fn modify_seed_min_deposit(&mut self, seed_id: String, min_deposit: U128) {
         self.assert_owner();
-        let mut farm_seed = self.get_seed(&seed_id);
-        farm_seed.get_ref_mut().min_deposit = min_deposit.into();
+        self.internal_update_seed_min_deposit(&seed_id, min_deposit);
     }
 
 
diff --git a/ref-farming/tests/test_min_deposit.rs b/ref-farming/tests/test_min_deposit.rs
new file mode 100644
index 0000000..967379f
--- /dev/null
+++ b/ref-farming/tests/test_min_deposit.rs
@@ -0,0 +1,73 @@
+use near_sdk_sim::{call, init_simulator, to_yocto};
+use near_sdk::serde_json::Value;
+
+use ref_farming::{HRSimpleFarmTerms};
+
+use crate::common::utils::*;
+use crate::common::init::deploy_farming;
+use crate::common::views::*;
+use crate::common::actions::*;
+
+mod common;
+
+#[test]
+fn test_min_deposit() {
+    let root = init_simulator(None);
+
+    println!("----->> Prepare accounts.");
+    let owner = root.create_user("owner".to_string(), to_yocto("100"));
+    let farmer = root.create_user("farmer1".to_string(), to_yocto("100"));
+    println!("<<----- owner and 1 farmers prepared.");
+
+    println!("----->> Prepare ref-exchange and swap pool.");
+    let (pool, token1, _) = prepair_pool_and_liquidity(
+        &root, &owner, farming_id(), vec![&farmer]);
+    println!("<<----- The pool prepaired.");
+
+    // deploy farming contract and register user
+    println!("----->> Deploy farming and register farmers.");
+    let farming = deploy_farming(&root, farming_id(), owner.account_id());
+    call!(farmer, farming.storage_deposit(None, None), deposit = to_yocto("1")).assert_success();
+    println!("<<----- farming deployed, farmers registered.");
+
+    // create farm
+    println!("----->> Create farm.");
+    let farm_id = "swap@0#0".to_string();
+    let seed_id = format!("{}@0", pool.account_id());
+    let out_come = call!(
+        owner,
+        farming.create_simple_farm(HRSimpleFarmTerms{
+            seed_id: seed_id.clone(),
+            reward_token: token1.valid_account_id(),
+            start_at: 0,
+            reward_per_session: to_yocto("1").into(),
+            session_interval: 60,
+        }, None),
+        deposit = to_yocto("1")
+    );
+    out_come.assert_success();
+    assert_eq!(Value::String(farm_id.clone()), out_come.unwrap_json_value());
+    println!("<<----- Farm {} created at #{}, ts:{}.", 
+    farm_id,
+    root.borrow_runtime().current_block().block_height, 
+    root.borrow_runtime().current_block().block_timestamp);
+
+    let seeds_info = show_seedsinfo(&farming, true);
+    assert_eq!(seeds_info.get(&seed_id).unwrap().min_deposit.0, to_yocto("0.000001"));
+
+    let out_come = call!(
+        owner,
+        farming.modify_seed_min_deposit(seed_id.clone(), to_yocto("2").into())
+    );
+    out_come.assert_success();
+
+    let seeds_info = show_seedsinfo(&farming, true);
+    assert_eq!(seeds_info.get(&seed_id).unwrap().min_deposit.0, to_yocto("2"));
+
+    let out_come = call!(
+        farmer,
+        pool.mft_transfer_call(":0".to_string(), to_va(farming_id()), to_yocto("1").into(), None, "".to_string()),
+        deposit = 1
+    );
+    assert!(format!("{:?}", out_come.promise_errors()[0].as_ref().unwrap().status()).contains("E34: below min_deposit of this seed"));
+}
\ No newline at end of file