diff --git a/.clang-tidy b/.clang-tidy
index ceb51884a5..1202d12c27 100644
--- a/.clang-tidy
+++ b/.clang-tidy
@@ -20,11 +20,9 @@ Checks: >-
   -cert-oop57-cpp,
   -cert-str34-c,
   -clang-analyzer-core.CallAndMessage,
-  -clang-analyzer-deadcode.DeadStores,
   -clang-analyzer-optin.*,
   -clang-analyzer-osx.*,
   -clang-analyzer-security.*,
-  -clang-diagnostic-fortify-source,
   -clang-diagnostic-shadow-field,
   -cppcoreguidelines-avoid-c-arrays,
   -cppcoreguidelines-avoid-goto,
diff --git a/esphome/components/as3935_spi/as3935_spi.cpp b/esphome/components/as3935_spi/as3935_spi.cpp
index 73752a8ee0..54b52b2fd0 100644
--- a/esphome/components/as3935_spi/as3935_spi.cpp
+++ b/esphome/components/as3935_spi/as3935_spi.cpp
@@ -33,7 +33,7 @@ void SPIAS3935Component::write_register(uint8_t reg, uint8_t mask, uint8_t bits,
 uint8_t SPIAS3935Component::read_register(uint8_t reg) {
   uint8_t value = 0;
   this->enable();
-  this->write_byte(reg |= SPI_READ_M);
+  this->write_byte(reg | SPI_READ_M);
   value = this->read_byte();
   // According to datsheet, the chip select must be written HIGH, LOW, HIGH
   // to correctly end the READ command.
diff --git a/esphome/components/rf_bridge/rf_bridge.cpp b/esphome/components/rf_bridge/rf_bridge.cpp
index b284a969b1..a63523917a 100644
--- a/esphome/components/rf_bridge/rf_bridge.cpp
+++ b/esphome/components/rf_bridge/rf_bridge.cpp
@@ -67,7 +67,7 @@ bool RFBridgeComponent::parse_bridge_byte_(uint8_t byte) {
 
       data.length = raw[2];
       data.protocol = raw[3];
-      char next_byte[2];
+      char next_byte[3];
       for (uint8_t i = 0; i < data.length - 1; i++) {
         sprintf(next_byte, "%02X", raw[4 + i]);
         data.code += next_byte;
@@ -85,7 +85,7 @@ bool RFBridgeComponent::parse_bridge_byte_(uint8_t byte) {
 
       uint8_t buckets = raw[2] << 1;
       std::string str;
-      char next_byte[2];
+      char next_byte[3];
 
       for (uint32_t i = 0; i <= at; i++) {
         sprintf(next_byte, "%02X", raw[i]);