diff --git a/Dockerfile b/Dockerfile
index 2d74b82..2bc9cb0 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -24,7 +24,7 @@ RUN echo "Building tags/${NODE_VERSION}..." \
 FROM ghcr.io/blinklabs-io/cardano-cli:10.12.0.0-1 AS cardano-cli
 FROM ghcr.io/blinklabs-io/cardano-configs:20251014-1 AS cardano-configs
 FROM ghcr.io/blinklabs-io/mithril-client:0.12.33-1 AS mithril-client
-FROM ghcr.io/blinklabs-io/mithril-signer:0.2.268-1 AS mithril-signer
+FROM ghcr.io/blinklabs-io/mithril-signer:0.2.276-1 AS mithril-signer
 FROM ghcr.io/blinklabs-io/nview:0.11.0 AS nview
 FROM ghcr.io/blinklabs-io/txtop:0.13.1 AS txtop