diff --git a/Makefile b/Makefile
index b8b672d..c206e65 100644
--- a/Makefile
+++ b/Makefile
@@ -1,25 +1,40 @@
 CC = gcc
 CFLAGS = -Wall -Wextra -std=c99 -Isrc -Isrc/miniz -Isrc/microtar
+CFLAGS_MINIZ = -Wall -Wextra -std=c99 -D_POSIX_C_SOURCE=200112L -Isrc -Isrc/miniz -Isrc/microtar -Wno-unused-function -Wno-implicit-function-declaration
 LIBS = -lm
 LIBS_STATIC = -static -lm
 ARCH = $(shell uname -m)
 TARGET = build/otp-$(ARCH)
-SOURCES = $(wildcard src/*.c) $(wildcard src/miniz/*.c) $(wildcard src/microtar/*.c)
+SOURCES = $(wildcard src/*.c)
+MINIZ_SOURCES = $(wildcard src/miniz/*.c)
+MICROTAR_SOURCES = $(wildcard src/microtar/*.c)
 OBJS = $(SOURCES:.c=.o)
+MINIZ_OBJS = $(MINIZ_SOURCES:.c=.o)
+MICROTAR_OBJS = $(MICROTAR_SOURCES:.c=.o)
+ALL_OBJS = $(OBJS) $(MINIZ_OBJS) $(MICROTAR_OBJS)
 
 # Default build target
-$(TARGET): $(OBJS)
+$(TARGET): $(ALL_OBJS)
 	@mkdir -p build
-	$(CC) $(CFLAGS) -o $(TARGET) $(OBJS) $(LIBS)
-	@rm -f $(OBJS)
+	$(CC) $(CFLAGS) -o $(TARGET) $(ALL_OBJS) $(LIBS)
+	@rm -f $(ALL_OBJS)
 
 # Static linking target
-static: $(OBJS)
+static: $(ALL_OBJS)
 	@mkdir -p build
-	$(CC) $(CFLAGS) -o $(TARGET) $(OBJS) $(LIBS_STATIC)
-	@rm -f $(OBJS)
+	$(CC) $(CFLAGS) -o $(TARGET) $(ALL_OBJS) $(LIBS_STATIC)
+	@rm -f $(ALL_OBJS)
 
-%.o: %.c
+# Compile main source files with full warnings
+src/%.o: src/%.c
+	$(CC) $(CFLAGS) -c $< -o $@
+
+# Compile miniz library files with reduced warnings
+src/miniz/%.o: src/miniz/%.c
+	$(CC) $(CFLAGS_MINIZ) -c $< -o $@
+
+# Compile microtar library files normally
+src/microtar/%.o: src/microtar/%.c
 	$(CC) $(CFLAGS) -c $< -o $@
 
 clean:
diff --git a/README.md b/README.md
index 619c994..3e3f8cb 100644
--- a/README.md
+++ b/README.md
@@ -58,14 +58,14 @@ One-time pads can be trivially encrypted and decrypted using pencil and paper, m
 
 ### Download Pre-Built Binaries
 
-**[Download Current Linux x86](https://git.laantungir.net/laantungir/otp/releases/download/v0.3.39/otp-v0.3.39-linux-x86_64)**
+**[Download Current Linux x86](https://git.laantungir.net/laantungir/otp/releases/download/v0.3.40/otp-v0.3.40-linux-x86_64)**
 
-**[Download Current Raspberry Pi 64](https://git.laantungir.net/laantungir/otp/releases/download/v0.3.39/otp-v0.3.39-linux-arm64)**
+**[Download Current Raspberry Pi 64](https://git.laantungir.net/laantungir/otp/releases/download/v0.3.40/otp-v0.3.40-linux-arm64)**
 
 After downloading:
 ```bash
 # Rename for convenience, then make executable
-mv otp-v0.3.39-linux-x86_64 otp
+mv otp-v0.3.40-linux-x86_64 otp
 chmod +x otp
 
 # Run it
diff --git a/src/main.h b/src/main.h
index 0fcce78..1fa3586 100644
--- a/src/main.h
+++ b/src/main.h
@@ -23,7 +23,7 @@
 #include <ctype.h>
 
 // Version - Updated automatically by build.sh
-#define OTP_VERSION "v0.3.39"
+#define OTP_VERSION "v0.3.40"
 
 // Constants
 #define MAX_INPUT_SIZE 4096
diff --git a/src/pads.c b/src/pads.c
index 1ef9023..141419d 100644
--- a/src/pads.c
+++ b/src/pads.c
@@ -470,6 +470,13 @@ char* select_pad_interactive(const char* title, const char* prompt, pad_filter_t
         return NULL;
     }
 
+    // If only one pad available, auto-select it
+    if (pad_count == 1) {
+        printf("\n%s\n", title);
+        printf("Only one pad available - auto-selecting: %.16s...\n\n", pads[0].chksum);
+        return strdup(pads[0].chksum);
+    }
+
     // Calculate minimal unique prefixes for each pad
     char prefixes[100][65];
     int prefix_lengths[100];