diff --git a/Dockerfile.debian b/Dockerfile.debian
index efa19e50da72051d79c5aed4cfc4f9af4f41c3f0..3b6949de623e45c1f4a9b8b35db8eccf8fe4e48a 100644
--- a/Dockerfile.debian
+++ b/Dockerfile.debian
@@ -15,7 +15,7 @@ RUN apt-get update && apt-get install -y \
   && rm -rf /var/lib/apt/lists/*
 
 # NOTE: cosign is not yet available in the debian apt sources
-ARG COSIGN_VERSION=2.4.2
+ARG COSIGN_VERSION=2.4.3
 WORKDIR /tmp
 RUN wget https://github.com/sigstore/cosign/releases/download/v${COSIGN_VERSION}/cosign_${COSIGN_VERSION}_${TARGETARCH}.deb && \
     dpkg -i *.deb && \