diff --git a/Dockerfile b/Dockerfile
index 7ac54191..079792af 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -44,14 +44,27 @@ FROM ankane/pgvector:v0.5.1 AS runtime
 # Overridable Node.js version with --build-arg NODE_VERSION
 ARG NODE_VERSION=22
 
-RUN apt-get update && \
+# Allow overriding the OpenTelemetry Collector version and let Docker inject TARGETARCH during build
+ARG OTEL_VERSION=0.96.0
+ARG TARGETARCH
+
+RUN set -eux; \
+    # Map TARGETARCH to the naming used by otel release assets
+    case "${TARGETARCH:-amd64}" in \
+      arm64|aarch64) OTEL_ARCH=arm64 ;; \
+      amd64|x86_64|x64) OTEL_ARCH=amd64 ;; \
+      *) OTEL_ARCH=amd64 ;; \
+    esac; \
+    apt-get update && \
     # Install curl, Python, and PostgreSQL client libraries
     apt-get install -y curl python3 python3-venv libpq-dev && \
     # Install Node.js
     curl -fsSL https://deb.nodesource.com/setup_${NODE_VERSION}.x | bash - && \
     apt-get install -y nodejs && \
-    # Install OpenTelemetry Collector
-    curl -L https://github.com/open-telemetry/opentelemetry-collector-releases/releases/download/v0.96.0/otelcol-contrib_0.96.0_linux_amd64.tar.gz -o /tmp/otel-collector.tar.gz && \
+    # Download and install OpenTelemetry Collector for the target architecture
+    OTEL_FILENAME="otelcol-contrib_${OTEL_VERSION}_linux_${OTEL_ARCH}.tar.gz"; \
+    echo "Downloading https://github.com/open-telemetry/opentelemetry-collector-releases/releases/download/v${OTEL_VERSION}/${OTEL_FILENAME}"; \
+    curl -L "https://github.com/open-telemetry/opentelemetry-collector-releases/releases/download/v${OTEL_VERSION}/${OTEL_FILENAME}" -o /tmp/otel-collector.tar.gz && \
     tar xzf /tmp/otel-collector.tar.gz -C /usr/local/bin && \
     rm /tmp/otel-collector.tar.gz && \
     mkdir -p /etc/otel && \