diff --git a/config.c b/config.c
index e83f57f..baa3a2d 100644
--- a/config.c
+++ b/config.c
@@ -382,8 +382,14 @@ bool config_load_from_file(const char *path, cocoon_config_t *config) {
                             }
                         }
                         if (prefix[0] && target[0] && config->num_proxies < COCOON_MAX_PROXY_RULES) {
-                            strncpy(config->proxies[config->num_proxies].prefix, prefix, sizeof(config->proxies[0].prefix)-1);
-                            strncpy(config->proxies[config->num_proxies].target, target, sizeof(config->proxies[0].target)-1);
+                            size_t prefix_len = strlen(prefix);
+                            if (prefix_len >= sizeof(config->proxies[0].prefix)) prefix_len = sizeof(config->proxies[0].prefix) - 1;
+                            memcpy(config->proxies[config->num_proxies].prefix, prefix, prefix_len);
+                            config->proxies[config->num_proxies].prefix[prefix_len] = '\0';
+                            size_t target_len = strlen(target);
+                            if (target_len >= sizeof(config->proxies[0].target)) target_len = sizeof(config->proxies[0].target) - 1;
+                            memcpy(config->proxies[config->num_proxies].target, target, target_len);
+                            config->proxies[config->num_proxies].target[target_len] = '\0';
                             config->num_proxies++;
                         }
                     } else {
diff --git a/proxy.c b/proxy.c
index 9a0f70a..45a1f57 100644
--- a/proxy.c
+++ b/proxy.c
@@ -78,8 +78,10 @@ bool proxy_add_rule(cocoon_proxy_config_t *cfg, const char *prefix, const char *
         rule->target_host[host_len] = '\0';
         rule->target_port = (uint16_t)atoi(colon + 1);
     } else {
-        strncpy(rule->target_host, host_port, sizeof(rule->target_host) - 1);
-        rule->target_host[sizeof(rule->target_host) - 1] = '\0';
+        size_t host_len = strlen(host_port);
+        if (host_len >= sizeof(rule->target_host)) host_len = sizeof(rule->target_host) - 1;
+        memcpy(rule->target_host, host_port, host_len);
+        rule->target_host[host_len] = '\0';
         rule->target_port = https ? 443 : 80;
     }
 
diff --git a/tests/integration_test.sh b/tests/integration_test.sh
index 979ec70..0a07cb0 100755
--- a/tests/integration_test.sh
+++ b/tests/integration_test.sh
@@ -27,6 +27,10 @@ kill_server() {
     if [[ -n "$pids" ]]; then
         echo "$pids" | xargs kill -9 2>/dev/null || true
     fi
+    pids=$(pgrep -f "cocoon.*-c " 2>/dev/null || true)
+    if [[ -n "$pids" ]]; then
+        echo "$pids" | xargs kill -9 2>/dev/null || true
+    fi
     sleep 0.5
     # 确保端口已释放
     for i in {1..20}; do