diff --git a/.github/workflows/integration-tests-against-docker.yaml b/.github/workflows/integration-tests-against-docker.yaml
index 477672dee..dbf2169c1 100644
--- a/.github/workflows/integration-tests-against-docker.yaml
+++ b/.github/workflows/integration-tests-against-docker.yaml
@@ -11,7 +11,6 @@ jobs:
       GOOGLE_CLOUD_INSTANCE: "pgadapter-testing"
       GOOGLE_CLOUD_DATABASE: "e2e_docker"
       GOOGLE_CLOUD_ENDPOINT: "spanner.googleapis.com"
-      DOCKERFILE: "build/Dockerfile.ci"
     steps:
       - uses: actions/checkout@v7
       - uses: actions/setup-java@v5
diff --git a/build/Dockerfile.ci b/build/Dockerfile.ci
deleted file mode 100644
index 55a0aef00..000000000
--- a/build/Dockerfile.ci
+++ /dev/null
@@ -1,16 +0,0 @@
-FROM ubuntu:26.04
-
-ARG UBER_JAR_PATH
-RUN apt-get update && apt-get -qq -y install default-jre
-
-COPY ${UBER_JAR_PATH} /home/pgadapter/pgadapter.jar
-COPY LICENSE /home/pgadapter/
-COPY CONTRIBUTING.md /home/pgadapter/
-COPY README.md /home/pgadapter/
-COPY logging.properties /home/pgadapter/
-
-# Add startup script.
-ADD build/startup.sh /home/pgadapter/startup.sh
-RUN chmod +x /home/pgadapter/startup.sh
-
-ENTRYPOINT ["/bin/bash", "/home/pgadapter/startup.sh"]
diff --git a/build/DockerfilePsql11 b/build/DockerfilePsql11
deleted file mode 100644
index d4288337d..000000000
--- a/build/DockerfilePsql11
+++ /dev/null
@@ -1,3 +0,0 @@
-FROM alpine:3.24
-RUN apk --no-cache add postgresql-client
-ENTRYPOINT [ "psql" ]
diff --git a/build/DockerfilePsql12 b/build/DockerfilePsql12
deleted file mode 100644
index d4288337d..000000000
--- a/build/DockerfilePsql12
+++ /dev/null
@@ -1,3 +0,0 @@
-FROM alpine:3.24
-RUN apk --no-cache add postgresql-client
-ENTRYPOINT [ "psql" ]
diff --git a/build/DockerfilePsql13 b/build/DockerfilePsql13
deleted file mode 100644
index 807743750..000000000
--- a/build/DockerfilePsql13
+++ /dev/null
@@ -1,3 +0,0 @@
-FROM alpine:3.24.1
-RUN apk --no-cache add postgresql13-client
-ENTRYPOINT [ "psql" ]
diff --git a/build/DockerfilePsql14 b/build/DockerfilePsql14
deleted file mode 100644
index 50093d84d..000000000
--- a/build/DockerfilePsql14
+++ /dev/null
@@ -1,3 +0,0 @@
-FROM alpine:3.24.1
-RUN apk --no-cache add postgresql14-client
-ENTRYPOINT [ "psql" ]
diff --git a/build/README.md b/build/README.md
deleted file mode 100644
index ce9e2c881..000000000
--- a/build/README.md
+++ /dev/null
@@ -1,11 +0,0 @@
-Build the different psql Docker images like this:
-
-```shell
-docker build . -f build/DockerfilePsql11 -t psql11
-```
-
-Run the different psql Docker images like this:
-
-```shell
-docker run --network="host" -it psql11 -h localhost -p 5432 -d my-test-db
-```