diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 9707eca..f2af2e8 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -23,7 +23,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v7
 
       - name: Install Arduino IDE
         run: |
diff --git a/cores/arduino/WString.cpp b/cores/arduino/WString.cpp
index dd5e2b2..2955561 100644
--- a/cores/arduino/WString.cpp
+++ b/cores/arduino/WString.cpp
@@ -334,14 +334,16 @@ unsigned char String::concat(unsigned long num)
 
 unsigned char String::concat(float num)
 {
-	char buf[20];
+	static size_t const FLOAT_BUF_SIZE = (FLT_MAX_10_EXP + 1) + 2 /* FIXED DECIMAL PLACES */ + 1 /* '-' */ + 1 /* '.' */ + 1 /* '\0' */;
+	char buf[FLOAT_BUF_SIZE];
 	char* string = dtostrf(num, 4, 2, buf);
 	return concat(string, strlen(string));
 }
 
 unsigned char String::concat(double num)
 {
-	char buf[20];
+	static size_t const DOUBLE_BUF_SIZE = (DBL_MAX_10_EXP + 1) + 2 /* FIXED DECIMAL PLACES */ + 1 /* '-' */ + 1 /* '.' */ + 1 /* '\0' */;
+	char buf[DOUBLE_BUF_SIZE];
 	char* string = dtostrf(num, 4, 2, buf);
 	return concat(string, strlen(string));
 }
diff --git a/platform.txt b/platform.txt
index 8c4f5eb..34875da 100644
--- a/platform.txt
+++ b/platform.txt
@@ -6,7 +6,7 @@
 # https://arduino.github.io/arduino-cli/latest/platform-specification/
 
 name=XInput AVR Boards
-version=1.0.6
+version=1.0.7
 
 # AVR compile variables
 # ---------------------