diff --git a/.devcontainer/Dockerfile b/.devcontainer/Dockerfile
index 55565a07..4f406566 100644
--- a/.devcontainer/Dockerfile
+++ b/.devcontainer/Dockerfile
@@ -1,6 +1,4 @@
-FROM ubuntu:22.10
-
-# TODO: install emscripten (https://emscripten.org/docs/getting_started/downloads.html)
+FROM ubuntu:24.04
 
 # TODO: Clean this up once buildkit is supported gracefully in devcontainers
 # https://github.com/microsoft/vscode-remote-release/issues/1409
@@ -27,7 +25,9 @@ RUN apt-get update \
     # ca certs need to be available for fetching git submodules
     ca-certificates \
     # python is used to convert binaries to uf2 files
-    python3 python-is-python3
+    python3 python-is-python3 \
+    # emscripten for building simulator
+    emscripten
 
 # Download and verify both x86-64 and aarch64 toolchains. This is unfortunate and
 # slows down the build, but it's a clean-ish option until buildkit can be used.
@@ -47,4 +47,4 @@ RUN /bin/sh -c 'set -ex && \
     fi'
 
 RUN rm $X86_64_TOOLCHAIN_FILENAME
-RUN rm $AARCH64_TOOLCHAIN_FILENAME
\ No newline at end of file
+RUN rm $AARCH64_TOOLCHAIN_FILENAME
diff --git a/movement/movement_custom_signal_tunes.h b/movement/movement_custom_signal_tunes.h
index cc21a5a8..27c1d397 100644
--- a/movement/movement_custom_signal_tunes.h
+++ b/movement/movement_custom_signal_tunes.h
@@ -70,16 +70,15 @@ int8_t signal_tune[] = {
 #ifdef SIGNAL_TUNE_KIM_POSSIBLE
 int8_t signal_tune[] = {
     BUZZER_NOTE_G7, 6,
-    BUZZER_NOTE_REST, 1,
-    BUZZER_NOTE_G4, 3,
+    BUZZER_NOTE_G4, 2,
     BUZZER_NOTE_REST, 5,
     BUZZER_NOTE_G7, 6,
-    BUZZER_NOTE_REST, 1,
-    BUZZER_NOTE_G4, 3,
+    BUZZER_NOTE_G4, 2,
     BUZZER_NOTE_REST, 5,
     BUZZER_NOTE_A7SHARP_B7FLAT, 6,
     BUZZER_NOTE_REST, 2,
     BUZZER_NOTE_G7, 6,
+    BUZZER_NOTE_G4, 2,
     0
 };
 #endif // SIGNAL_TUNE_KIM_POSSIBLE