diff --git a/code/espurna/ntp.ino b/code/espurna/ntp.ino
index 02a6520f..f260f542 100644
--- a/code/espurna/ntp.ino
+++ b/code/espurna/ntp.ino
@@ -52,12 +52,12 @@ void ntpSetup() {
                 DEBUG_MSG_P(PSTR("[NTP] Error: Invalid NTP server address\n"));
             }
             #if WEB_SUPPORT
-                wsSend("{\"ntpStatus\": false}");
+                wsSend_P(PSTR("{\"ntpStatus\": false}"));
             #endif
         } else {
             DEBUG_MSG_P(PSTR("[NTP] Time: %s\n"), (char *) ntpDateTime().c_str());
             #if WEB_SUPPORT
-                wsSend("{\"ntpStatus\": true}");
+                wsSend_P(PSTR("{\"ntpStatus\": true}"));
             #endif
         }
     });
diff --git a/code/espurna/ota.ino b/code/espurna/ota.ino
index 2b5724ad..17116b0e 100644
--- a/code/espurna/ota.ino
+++ b/code/espurna/ota.ino
@@ -25,7 +25,7 @@ void otaSetup() {
     ArduinoOTA.onStart([]() {
         DEBUG_MSG_P(PSTR("[OTA] Start\n"));
         #if WEB_SUPPORT
-            wsSend("{\"message\": \"OTA update started\"}");
+            wsSend_P(PSTR("{\"message\": \"OTA update started\"}"));
         #endif
     });
 
@@ -33,7 +33,7 @@ void otaSetup() {
         customReset(CUSTOM_RESET_OTA);
         DEBUG_MSG_P(PSTR("\n[OTA] End\n"));
         #if WEB_SUPPORT
-            wsSend("{\"action\": \"reload\"}");
+            wsSend_P(PSTR("{\"action\": \"reload\"}"));
         #endif
         delay(100);
     });
diff --git a/code/espurna/relay.ino b/code/espurna/relay.ino
index 687bbdcf..27572891 100644
--- a/code/espurna/relay.ino
+++ b/code/espurna/relay.ino
@@ -153,7 +153,7 @@ void relayPulseMode(unsigned int value, bool report) {
 
     #if WEB_SUPPORT
         char message[20];
-        sprintf_P(message, PSTR("{\"relayPulseMode\": %d}"), value);
+        snprintf_P(message, strlen(message), PSTR("{\"relayPulseMode\": %d}"), value);
         wsSend(message);
     #endif
 
diff --git a/code/espurna/rfbridge.ino b/code/espurna/rfbridge.ino
index beb572fe..83b9fde4 100644
--- a/code/espurna/rfbridge.ino
+++ b/code/espurna/rfbridge.ino
@@ -102,7 +102,7 @@ void _rfbDecode() {
         _rfbAck();
         DEBUG_MSG_P(PSTR("[RFBRIDGE] Learn timeout\n"));
         #if WEB_SUPPORT
-            wsSend("{\"action\": \"rfbTimeout\"}");
+            wsSend_P(PSTR("{\"action\": \"rfbTimeout\"}"));
         #endif
     }
 
diff --git a/code/espurna/web.ino b/code/espurna/web.ino
index 7d457dc4..b5004458 100644
--- a/code/espurna/web.ino
+++ b/code/espurna/web.ino
@@ -52,11 +52,11 @@ std::vector<web_api_t> _apis;
 void _wsMQTTCallback(unsigned int type, const char * topic, const char * payload) {
 
     if (type == MQTT_CONNECT_EVENT) {
-        wsSend("{\"mqttStatus\": true}");
+        wsSend_P(PSTR("{\"mqttStatus\": true}"));
     }
 
     if (type == MQTT_DISCONNECT_EVENT) {
-        wsSend("{\"mqttStatus\": false}");
+        wsSend_P(PSTR("{\"mqttStatus\": false}"));
     }
 
 }
@@ -68,7 +68,7 @@ void _wsParse(uint32_t client_id, uint8_t * payload, size_t length) {
     JsonObject& root = jsonBuffer.parseObject((char *) payload);
     if (!root.success()) {
         DEBUG_MSG_P(PSTR("[WEBSOCKET] Error parsing data\n"));
-        wsSend(client_id, "{\"message\": \"Error parsing data!\"}");
+        wsSend_P(client_id, PSTR("{\"message\": \"Error parsing data!\"}"));
         return;
     }
 
@@ -103,7 +103,7 @@ void _wsParse(uint32_t client_id, uint8_t * payload, size_t length) {
 
             JsonObject& data = root["data"];
             if (!data.containsKey("app") || (data["app"] != APP_NAME)) {
-                wsSend(client_id, "{\"message\": \"The file does not look like a valid configuration backup.\"}");
+                wsSend_P(client_id, PSTR("{\"message\": \"The file does not look like a valid configuration backup.\"}"));
                 return;
             }
 
@@ -119,7 +119,7 @@ void _wsParse(uint32_t client_id, uint8_t * payload, size_t length) {
 
             saveSettings();
 
-            wsSend(client_id, "{\"message\": \"Changes saved. You should reboot your board now.\"}");
+            wsSend_P(client_id, PSTR("{\"message\": \"Changes saved. You should reboot your board now.\"}"));
 
         }
 
@@ -264,11 +264,11 @@ void _wsParse(uint32_t client_id, uint8_t * payload, size_t length) {
             }
             if (key == "adminPass2") {
                 if (!value.equals(adminPass)) {
-                    wsSend(client_id, "{\"message\": \"Passwords do not match!\"}");
+                    wsSend_P(client_id, PSTR("{\"message\": \"Passwords do not match!\"}"));
                     return;
                 }
                 if (value.length() == 0) continue;
-                wsSend(client_id, "{\"action\": \"reload\"}");
+                wsSend_P(client_id, PSTR("{\"action\": \"reload\"}"));
                 key = String("adminPass");
             }
 
@@ -371,9 +371,9 @@ void _wsParse(uint32_t client_id, uint8_t * payload, size_t length) {
         }
 
         if (changed) {
-            wsSend(client_id, "{\"message\": \"Changes saved\"}");
+            wsSend_P(client_id, PSTR("{\"message\": \"Changes saved\"}"));
         } else {
-            wsSend(client_id, "{\"message\": \"No changes detected\"}");
+            wsSend_P(client_id, PSTR("{\"message\": \"No changes detected\"}"));
         }
 
     }
@@ -608,7 +608,7 @@ bool _wsAuth(AsyncWebSocketClient * client) {
 
     if (index == WS_BUFFER_SIZE) {
         DEBUG_MSG_P(PSTR("[WEBSOCKET] Validation check failed\n"));
-        wsSend(client->id(), "{\"message\": \"Session expired, please reload page...\"}");
+        wsSend_P(client->id(), PSTR("{\"message\": \"Session expired, please reload page...\"}"));
         return false;
     }
 
@@ -663,16 +663,30 @@ bool wsConnected() {
     return (_ws.count() > 0);
 }
 
-bool wsSend(const char * payload) {
+void wsSend(const char * payload) {
     if (_ws.count() > 0) {
         _ws.textAll(payload);
     }
 }
 
-bool wsSend(uint32_t client_id, const char * payload) {
+void wsSend_P(PGM_P payload) {
+    if (_ws.count() > 0) {
+        char buffer[strlen_P(payload)];
+        strcpy_P(buffer, payload);
+        _ws.textAll(buffer);
+    }
+}
+
+void wsSend(uint32_t client_id, const char * payload) {
     _ws.text(client_id, payload);
 }
 
+void wsSend_P(uint32_t client_id, PGM_P payload) {
+    char buffer[strlen_P(payload)];
+    strcpy_P(buffer, payload);
+    _ws.text(client_id, buffer);
+}
+
 void wsSetup() {
     _ws.onEvent(_wsEvent);
     mqttRegister(_wsMQTTCallback);