diff --git a/CHANGELOG.md b/CHANGELOG.md
index 1f3276a..8d255f6 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,7 @@
+### 0.0.16
+
+* Bugfix: Ensure that analog reads return unsigned values.
+
 ### 0.0.15
 
 * Add the ability to do analog reads.
diff --git a/src/main.cpp b/src/main.cpp
index aa6f74b..420469f 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -315,7 +315,7 @@ int gpio_digital_read(CommandRouter *cmd, int argc, const char **argv) {
   uint8_t pin = strtol(argv[1], nullptr, 0);
   uint8_t value = digitalRead(pin);
 
-  snprintf(cmd->buffer, cmd->buffer_size, "%d", value);
+  snprintf(cmd->buffer, cmd->buffer_size, "%u", value);
   return 0;
 }
 
@@ -339,7 +339,7 @@ int analog_read(CommandRouter *cmd, int argc, const char **argv) {
   uint8_t pin = strtol(argv[1], nullptr, 0);
   uint8_t value = analogRead(pin);
 
-  snprintf(cmd->buffer, cmd->buffer_size, "%d", value);
+  snprintf(cmd->buffer, cmd->buffer_size, "%u", value);
   return 0;
 }