diff --git a/src/handle_swap_sign_transaction.c b/src/handle_swap_sign_transaction.c
index 67bdff1..e4c7111 100644
--- a/src/handle_swap_sign_transaction.c
+++ b/src/handle_swap_sign_transaction.c
@@ -10,7 +10,7 @@ bool copy_transaction_parameters(create_transaction_parameters_t* sign_transacti
     // We need this "trick" as the input data position can overlap with app-ethereum globals
     txStringProperties_t stack_data;
     memset(&stack_data, 0, sizeof(stack_data));
-    strncpy(stack_data.fullAddress,
+    strlcpy(stack_data.fullAddress,
             sign_transaction_params->destination_address,
             sizeof(stack_data.fullAddress));
     if ((stack_data.fullAddress[sizeof(stack_data.fullAddress) - 1] != '\0') ||
diff --git a/src/utils.c b/src/utils.c
index e662209..85f2add 100644
--- a/src/utils.c
+++ b/src/utils.c
@@ -93,7 +93,7 @@ bool uint256_to_decimal(const uint8_t *value, size_t value_len, char *out, size_
             // Not enough space to hold "0" and \0.
             return false;
         }
-        strncpy(out, "0", out_len);
+        strlcpy(out, "0", out_len);
         return true;
     }
 
diff --git a/src_features/signTx/logic_signTx.c b/src_features/signTx/logic_signTx.c
index 336679f..8020859 100644
--- a/src_features/signTx/logic_signTx.c
+++ b/src_features/signTx/logic_signTx.c
@@ -416,7 +416,7 @@ void finalizeParsing(bool direct) {
                          tmpContent.txContent.nonce.length,
                          &nonce);
         tostring256(&nonce, 10, displayBuffer, sizeof(displayBuffer));
-        strncpy(strings.common.nonce, displayBuffer, sizeof(strings.common.nonce));
+        strlcpy(strings.common.nonce, displayBuffer, sizeof(strings.common.nonce));
     }
     // Compute maximum fee
     if (genericUI) {
@@ -444,7 +444,7 @@ void finalizeParsing(bool direct) {
             }
         } else {
             // Network name found, simply copy it.
-            strncpy(strings.common.network_name, name, sizeof(strings.common.network_name));
+            strlcpy(strings.common.network_name, name, sizeof(strings.common.network_name));
         }
     }
 
diff --git a/src_plugins/erc20/erc20_plugin.c b/src_plugins/erc20/erc20_plugin.c
index 292bba0..156ca07 100644
--- a/src_plugins/erc20/erc20_plugin.c
+++ b/src_plugins/erc20/erc20_plugin.c
@@ -66,7 +66,7 @@ bool check_contract(erc20_parameters_t *context) {
     for (size_t i = 0; i < NUM_CONTRACTS; i++) {
         contract_t *contract = (contract_t *) PIC(&CONTRACTS[i]);
         if (memcmp(contract->address, context->destinationAddress, ADDRESS_LENGTH) == 0) {
-            strncpy(context->contract_name, contract->name, sizeof(context->contract_name));
+            strlcpy(context->contract_name, contract->name, sizeof(context->contract_name));
             return true;
         }
     }