diff --git a/.drone.yml b/.drone.yml
index 1e7b285..c340edb 100644
--- a/.drone.yml
+++ b/.drone.yml
@@ -15,7 +15,7 @@ steps:
 - name: build hermes
   image: alpine
   commands:
-  - apk add -t hermes-build-deps --no-cache graphviz doxygen gcc make openssl-dev libspf2-dev cmake g++ sqlite-dev gettext-dev python3 boost-dev
+  - apk add -t hermes-build-deps --no-cache graphviz doxygen gcc make openssl-dev libspf2-dev cmake g++ sqlite-dev gettext-dev python3 boost-dev fmt-dev
   - cmake -B build_dir -D BUILD_DOCS=ON
   - cmake --build build_dir
 - name: docker image build
@@ -41,7 +41,7 @@ steps:
 - name: build hermes
   image: alpine
   commands:
-  - apk add -t hermes-build-deps --no-cache graphviz doxygen gcc make openssl-dev libspf2-dev cmake g++ sqlite-dev gettext-dev python3 boost-dev
+  - apk add -t hermes-build-deps --no-cache graphviz doxygen gcc make openssl-dev libspf2-dev cmake g++ sqlite-dev gettext-dev python3 boost-dev fmt-dev
   - cmake -B build_dir
   - cmake --build build_dir
 - name: docker image build
diff --git a/Dockerfile b/Dockerfile
index 9ecde43..f343e6b 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,7 +1,7 @@
 FROM alpine:3.18
 ADD . /hermes
 WORKDIR /hermes
-RUN apk add --no-cache graphviz doxygen gcc make openssl-dev libspf2-dev cmake g++ sqlite-dev gettext-dev python3 boost-dev
+RUN apk add --no-cache graphviz doxygen gcc make openssl-dev libspf2-dev cmake g++ sqlite-dev gettext-dev python3 boost-dev fmt-dev
 RUN cmake -B build
 RUN cmake --build build
 RUN mkdir /hermes-installation
@@ -10,5 +10,5 @@ RUN cmake --install build --prefix /hermes-installation
 FROM alpine:3.18
 EXPOSE 25
 COPY --from=0 /hermes-installation /hermes
-RUN apk add --no-cache openssl libspf2 sqlite-libs libstdc++ libgcc
+RUN apk add --no-cache openssl libspf2 sqlite-libs libstdc++ libgcc fmt
 CMD ["/hermes/bin/hermes", "/config/hermesrc"]