diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 882060c..8453cbc 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -158,7 +158,9 @@ jobs:
         uses: softprops/action-gh-release@v2
         with:
           body: ${{steps.github_release.outputs.changelog}}
+          make_latest: true
           draft: false
+          prerelease: false
           files: |
             artifacts/*.bin
             artifacts/*.elf
diff --git a/platformio.ini b/platformio.ini
index f3c7ea0..5c17850 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -72,8 +72,7 @@ lib_deps =
   mathieucarbou/MycilaLogger @ 3.2.0
   mathieucarbou/MycilaMQTT @ 4.2.2
   mathieucarbou/MycilaNTP @ 5.0.1
-  mathieucarbou/MycilaPulseAnalyzer @ 2.3.6
-  ; https://github.com/mathieucarbou/MycilaPulseAnalyzer
+  mathieucarbou/MycilaPulseAnalyzer @ 2.4.0
   mathieucarbou/MycilaPZEM004Tv3 @ 5.0.0
   mathieucarbou/MycilaRelay @ 4.0.1
   mathieucarbou/MycilaSystem @ 3.1.0
@@ -146,8 +145,9 @@ build_flags =
   -Og
   ; -Os
   -D CONFIG_ARDUHAL_LOG_COLORS
-  ; -D CORE_DEBUG_LEVEL=ARDUHAL_LOG_LEVEL_INFO
-  -D CORE_DEBUG_LEVEL=ARDUHAL_LOG_LEVEL_VERBOSE
+  -D CORE_DEBUG_LEVEL=ARDUHAL_LOG_LEVEL_INFO
+  ; -D CORE_DEBUG_LEVEL=ARDUHAL_LOG_LEVEL_DEBUG
+  ; -D CORE_DEBUG_LEVEL=ARDUHAL_LOG_LEVEL_VERBOSE
 build_unflags =
     -std=gnu++11
 
diff --git a/src/Utils.cpp b/src/Utils.cpp
index 5400632..1f97d0d 100644
--- a/src/Utils.cpp
+++ b/src/Utils.cpp
@@ -14,11 +14,11 @@ float detectGridFrequency() {
     return frequency;
 
   frequency = round(pzemO1.data.frequency);
-  if (frequency)
+  if (!isnanf(frequency) && frequency)
     return frequency;
 
   frequency = round(pzemO2.data.frequency);
-  if (frequency)
+  if (!isnanf(frequency) && frequency)
     return frequency;
 
   frequency = config.get(KEY_GRID_FREQUENCY).toInt();