diff --git a/.config/docker_example.yml b/.config/docker_example.yml
index 8c41261f6878..d80516ce2ceb 100644
--- a/.config/docker_example.yml
+++ b/.config/docker_example.yml
@@ -72,7 +72,7 @@ dbReplications: false
 #───┘ Redis configuration └─────────────────────────────────────
 
 redis:
-  host: keydb
+  host: dragonfly
   port: 6379
   #family: 0  # 0=Both, 4=IPv4, 6=IPv6
   #pass: example-pass
@@ -80,7 +80,7 @@ redis:
   #db: 1
 
 #redisForPubsub:
-#  host: keydb
+#  host: dragonfly
 #  port: 6379
 #  #family: 0  # 0=Both, 4=IPv4, 6=IPv6
 #  #pass: example-pass
@@ -88,7 +88,7 @@ redis:
 #  #db: 1
 
 #redisForJobQueue:
-#  host: keydb
+#  host: dragonfly
 #  port: 6379
 #  #family: 0  # 0=Both, 4=IPv4, 6=IPv6
 #  #pass: example-pass
@@ -96,7 +96,7 @@ redis:
 #  #db: 1
 
 #redisForTimelines:
-#  host: keydb
+#  host: dragonfly
 #  port: 6379
 #  #family: 0  # 0=Both, 4=IPv4, 6=IPv6
 #  #pass: example-pass
diff --git a/.devcontainer/devcontainer.yml b/.devcontainer/devcontainer.yml
index 38dbb0bb69b5..baf1d3381521 100644
--- a/.devcontainer/devcontainer.yml
+++ b/.devcontainer/devcontainer.yml
@@ -72,7 +72,7 @@ dbReplications: false
 #───┘ Redis configuration └─────────────────────────────────────
 
 redis:
-  host: keydb
+  host: dragonfly
   port: 6379
   #family: 0  # 0=Both, 4=IPv4, 6=IPv6
   #pass: example-pass
@@ -80,7 +80,7 @@ redis:
   #db: 1
 
 #redisForPubsub:
-#  host: keydb
+#  host: dragonfly
 #  port: 6379
 #  #family: 0  # 0=Both, 4=IPv4, 6=IPv6
 #  #pass: example-pass
@@ -88,7 +88,7 @@ redis:
 #  #db: 1
 
 #redisForJobQueue:
-#  host: keydb
+#  host: dragonfly
 #  port: 6379
 #  #family: 0  # 0=Both, 4=IPv4, 6=IPv6
 #  #pass: example-pass
@@ -96,7 +96,7 @@ redis:
 #  #db: 1
 
 #redisForTimelines:
-#  host: keydb
+#  host: dragonfly
 #  port: 6379
 #  #family: 0  # 0=Both, 4=IPv4, 6=IPv6
 #  #pass: example-pass
diff --git a/.devcontainer/docker-compose.yml b/.devcontainer/docker-compose.yml
index ece9e8f113a8..d9f38b8235fc 100644
--- a/.devcontainer/docker-compose.yml
+++ b/.devcontainer/docker-compose.yml
@@ -15,17 +15,25 @@ services:
       - internal_network
       - external_network
 
-  keydb:
+  dragonfly:
     restart: unless-stopped
-    image: eqalpha/keydb:latest
+    image: docker.dragonflydb.io/dragonflydb/dragonfly
+    ulimits:
+      memlock: -1
+    environment:
+      DFLY_snapshot_cron: '* * * * *'
+      DFLY_version_check: false
+      DFLY_tcp_backlog: 2048
+      DFLY_default_lua_flags: allow-undeclared-keys
+      DFLY_pipeline_squash: 0
+      DFLY_multi_exec_squash: false
+      DFLY_conn_io_threads: 4
+      DFLY_epoll_file_threads: 4
+      DFLY_proactor_threads: 4
     networks:
       - internal_network
     volumes:
-      - keydb-data:/data
-    healthcheck:
-      test: "keydb-cli ping"
-      interval: 5s
-      retries: 20
+      - dragonfly-data:/data
 
   db:
     restart: unless-stopped
@@ -45,7 +53,7 @@ services:
 
 volumes:
   postgres-data:
-  keydb-data:
+  dragonfly-data:
 
 networks:
   internal_network:
diff --git a/.dockerignore b/.dockerignore
index 78d119f943aa..087e9861e4cd 100644
--- a/.dockerignore
+++ b/.dockerignore
@@ -11,7 +11,6 @@ docker-compose.yml
 node_modules/
 packages/*/node_modules
 redis/
-keydb/
 files/
 fluent-emojis/
 .pnp.*
diff --git a/.github/workflows/test-backend.yml b/.github/workflows/test-backend.yml
index d6a07299b9d5..1326f37f2ae5 100644
--- a/.github/workflows/test-backend.yml
+++ b/.github/workflows/test-backend.yml
@@ -32,8 +32,18 @@ jobs:
         env:
           POSTGRES_DB: test-misskey
           POSTGRES_HOST_AUTH_METHOD: trust
-      keydb:
-        image: eqalpha/keydb:latest
+      dragonfly:
+        image: docker.dragonflydb.io/dragonflydb/dragonfly
+        options: --ulimit "memlock=-1"
+        env:
+          DFLY_version_check: false
+          DFLY_tcp_backlog: 2048
+          DFLY_default_lua_flags: allow-undeclared-keys
+          DFLY_pipeline_squash: 0
+          DFLY_multi_exec_squash: false
+          DFLY_conn_io_threads: 4
+          DFLY_epoll_file_threads: 4
+          DFLY_proactor_threads: 4
         ports:
           - 56312:6379
 
@@ -84,8 +94,18 @@ jobs:
         env:
           POSTGRES_DB: test-misskey
           POSTGRES_HOST_AUTH_METHOD: trust
-      keydb:
-        image: eqalpha/keydb:latest
+      dragonfly:
+        image: docker.dragonflydb.io/dragonflydb/dragonfly
+        options: --ulimit "memlock=-1"
+        env:
+          DFLY_version_check: false
+          DFLY_tcp_backlog: 2048
+          DFLY_default_lua_flags: allow-undeclared-keys
+          DFLY_pipeline_squash: 0
+          DFLY_multi_exec_squash: false
+          DFLY_conn_io_threads: 4
+          DFLY_epoll_file_threads: 4
+          DFLY_proactor_threads: 4
         ports:
           - 56312:6379
 
diff --git a/.gitignore b/.gitignore
index 644fe56d63c4..c417e986518f 100644
--- a/.gitignore
+++ b/.gitignore
@@ -53,7 +53,6 @@ run.bat
 api-docs.json
 *.log
 /redis
-/keydb
 *.code-workspace
 .DS_Store
 /files
diff --git a/chart/templates/Deployment.yml b/chart/templates/Deployment.yml
index a6ea8b216060..2d3c89e673b9 100644
--- a/chart/templates/Deployment.yml
+++ b/chart/templates/Deployment.yml
@@ -37,8 +37,25 @@ spec:
               value: "misskey"
           ports:
             - containerPort: 5432
-        - name: keydb
-          image: eqalpha/keydb:latest
+        - name: dragonfly
+          image: docker.dragonflydb.io/dragonflydb/dragonfly
+          env:
+            - name: DFLY_version_check
+              value: false
+            - name: DFLY_tcp_backlog
+              value: 2048
+            - name: DFLY_default_lua_flags
+              value: allow-undeclared-keys
+            - name: DFLY_pipeline_squash
+              value: 0
+            - name: DFLY_multi_exec_squash
+              value: false
+            - name: DFLY_conn_io_threads
+              value: 4
+            - name: DFLY_epoll_file_threads
+              value: 4
+            - name: DFLY_proactor_threads
+              value: 4
           ports:
             - containerPort: 6379
       volumes:
diff --git a/docker-compose.local-db.yml b/docker-compose.local-db.yml
index f758e03b6428..25793bc4f852 100644
--- a/docker-compose.local-db.yml
+++ b/docker-compose.local-db.yml
@@ -3,17 +3,25 @@ version: "3"
 # このconfigは、 dockerでMisskey本体を起動せず、 redisとpostgresql などだけを起動します
 
 services:
-  keydb:
+  dragonfly:
     restart: always
-    image: eqalpha/keydb:latest
+    image: docker.dragonflydb.io/dragonflydb/dragonfly
+    ulimits:
+      memlock: -1
+    environment:
+      DFLY_snapshot_cron: '* * * * *'
+      DFLY_version_check: false
+      DFLY_tcp_backlog: 2048
+      DFLY_default_lua_flags: allow-undeclared-keys
+      DFLY_pipeline_squash: 0
+      DFLY_multi_exec_squash: false
+      DFLY_conn_io_threads: 4
+      DFLY_epoll_file_threads: 4
+      DFLY_proactor_threads: 4
     ports:
       - "6379:6379"
     volumes:
-      - ./keydb:/data
-    healthcheck:
-      test: "keydb-cli ping"
-      interval: 5s
-      retries: 20
+      - ./redis:/data
 
   db:
     restart: always
diff --git a/docker-compose_example.yml b/docker-compose_example.yml
index aad72273057f..379bc3d77f7c 100644
--- a/docker-compose_example.yml
+++ b/docker-compose_example.yml
@@ -6,13 +6,13 @@ services:
     restart: always
     links:
       - db
-      - keydb
+      - dragonfly
 #     - mcaptcha
 #     - meilisearch
     depends_on:
       db:
         condition: service_healthy
-      keydb:
+      dragonfly:
         condition: service_healthy
     ports:
       - "3000:3000"
@@ -23,17 +23,25 @@ services:
       - ./files:/misskey/files
       - ./.config:/misskey/.config:ro
 
-  keydb:
+  dragonfly:
     restart: always
-    image: eqalpha/keydb:latest
+    image: docker.dragonflydb.io/dragonflydb/dragonfly
+    ulimits:
+      memlock: -1
+    environment:
+      DFLY_snapshot_cron: '* * * * *'
+      DFLY_version_check: false
+      DFLY_tcp_backlog: 2048
+      DFLY_default_lua_flags: allow-undeclared-keys
+      DFLY_pipeline_squash: 0
+      DFLY_multi_exec_squash: false
+      DFLY_conn_io_threads: 4
+      DFLY_epoll_file_threads: 4
+      DFLY_proactor_threads: 4
     networks:
       - internal_network
     volumes:
-      - ./keydb:/data
-    healthcheck:
-      test: "keydb-cli ping"
-      interval: 5s
-      retries: 20
+      - ./redis:/data
 
   db:
     restart: always
diff --git a/packages/backend/test/docker-compose.yml b/packages/backend/test/docker-compose.yml
index 286a6607a5aa..74659a952ae8 100644
--- a/packages/backend/test/docker-compose.yml
+++ b/packages/backend/test/docker-compose.yml
@@ -1,8 +1,19 @@
 version: "3"
 
 services:
-  keydbtest:
-    image: eqalpha/keydb:latest
+  dragonflytest:
+    image: docker.dragonflydb.io/dragonflydb/dragonfly
+    ulimits:
+      memlock: -1
+    environment:
+      DFLY_version_check: false
+      DFLY_tcp_backlog: 2048
+      DFLY_default_lua_flags: allow-undeclared-keys
+      DFLY_pipeline_squash: 0
+      DFLY_multi_exec_squash: false
+      DFLY_conn_io_threads: 4
+      DFLY_epoll_file_threads: 4
+      DFLY_proactor_threads: 4
     ports:
       - "127.0.0.1:56312:6379"