diff --git a/config/config.yaml b/config/config.yaml
deleted file mode 100644
index afd495046..000000000
--- a/config/config.yaml
+++ /dev/null
@@ -1,157 +0,0 @@
-# Wallet address, path to the wallet must be set as cli parameter or environment variable
-wallet:
-  path: /path/to/wallet.json # Path to wallet
-  passphrase: "" # Passphrase to decrypt wallet. If you're using a wallet without a password, place '' here.
-  address: NfgHwwTi3wHAS8aFAN243C5vGbkYDpqLHP # Account address. If omitted default one will be used.
-
-# Nodes configuration
-# This configuration makes the gateway use the first node (grpc://s01.frostfs.devenv:8080)
-# while it's healthy. Otherwise, gateway uses the second node (grpc://s01.frostfs.devenv:8080)
-# for 10% of requests and the third node (grpc://s03.frostfs.devenv:8080) for 90% of requests.
-# Until nodes with the same priority level are healthy
-# nodes with other priority are not used.
-# The lower the value, the higher the priority.
-peers:
-  0:
-    address: node1.frostfs:8080
-    priority: 1
-    weight: 1
-  1:
-    address: node2.frostfs:8080
-    priority: 2
-    weight: 0.1
-  2:
-    address: node3.frostfs:8080
-    priority: 2
-    weight: 0.9
-
-server:
-  - address: 0.0.0.0:8080
-    tls:
-      enabled: false
-      cert_file: /path/to/cert
-      key_file: /path/to/key
-  - address: 0.0.0.0:8081
-    tls:
-      enabled: true
-      cert_file: /path/to/cert
-      key_file: /path/to/key
-
-# Domains to be able to use virtual-hosted-style access to bucket.
-listen_domains:
-  - s3dev.frostfs.devenv
-
-logger:
-  level: debug
-
-# Endpoint of the tree service. Must be provided. Can be one of the node address (from the `peers` section).
-tree:
-  service: node1.frostfs:8080
-
-# RPC endpoint and order of resolving of bucket names
-rpc_endpoint: http://morph-chain.frostfs.devenv:30333
-resolve_order:
-  - nns
-
-# Metrics
-pprof:
-  enabled: false
-  address: localhost:8085
-
-prometheus:
-  enabled: false
-  address: localhost:8086
-
-# Timeout to connect to a node
-connect_timeout: 10s
-# Timeout for individual operations in streaming RPC.
-stream_timeout: 10s
-# Timeout to check node health during rebalance
-healthcheck_timeout: 15s
-# Interval to check node health
-rebalance_interval: 60s
-# The number of errors on connection after which node is considered as unhealthy
-pool_error_threshold: 100
-
-
-# Limits for processing of clients' requests
-max_clients_count: 100
-# Deadline after which the gate sends error `RequestTimeout` to a client
-max_clients_deadline: 30s
-
-# Caching
-cache:
-  # Cache for objects
-  objects:
-    lifetime: 300s
-    size: 150
-  # Cache which keeps lists of objects in buckets
-  list:
-    lifetime: 1m
-    size: 100
-  # Cache which contains mapping of nice name to object addresses
-  names:
-    lifetime: 1m
-    size: 1000
-  # Cache which contains mapping of bucket name to bucket info
-  buckets:
-    lifetime: 1m
-    size: 500
-  # Cache for system objects in a bucket: bucket settings, notification configuration etc
-  system:
-    lifetime: 2m
-    size: 1000
-  # Cache which stores access box with tokens by its address
-  accessbox:
-    lifetime: 5m
-    size: 10
-  # Cache which stores owner to cache operation mapping
-  accesscontrol:
-    lifetime: 1m
-    size: 100000
-
-nats:
-  enabled: true
-  endpoint: nats://localhost:4222
-  timeout: 30s
-  cert_file: /path/to/cert
-  key_file: /path/to/key
-  root_ca: /path/to/ca
-
-# Parameters of FrostFS container placement policy
-placement_policy:
-  # Default policy of placing containers in FrostFS
-  # If a user sends a request `CreateBucket` and doesn't define policy for placing of a container in FrostFS, the S3 Gateway
-  # will put the container with default policy.
-  default: REP 3
-  # Region to placement policy mapping json file.
-  # Path to container policy mapping. The same as '--container-policy' flag for authmate
-  region_mapping: /path/to/container/policy.json
-
-# CORS
-# value of Access-Control-Max-Age header if this value is not set in a rule. Has an int type.
-cors:
-  default_max_age: 600
-
-# Parameters of requests to FrostFS
-frostfs:
-  # Number of the object copies to consider PUT to FrostFS successful.
-  # `0` means that object will be processed according to the container's placement policy
-  set_copies_number: 0
-
-# List of allowed AccessKeyID prefixes
-# If the parameter is omitted, S3 GW will accept all AccessKeyIDs
-allowed_access_key_id_prefixes:
-  - Ck9BHsgKcnwfCTUSFm6pxhoNS4cBqgN2NQ8zVgPjqZDX
-  - 3stjWenX15YwYzczMr88gy3CQr4NYFBQ8P7keGzH5QFn
-
-resolve_bucket:
-  allow:
-    - container
-  deny:
-
-kludge:
-  # Enable using default xml namespace `http://s3.amazonaws.com/doc/2006-03-01/` when parse`CompleteMultipartUpload` xml body.
-  use_default_xmlns_for_complete_multipart: false
-  # Set timeout between whitespace transmissions during CompleteMultipartUpload processing.
-  complete_multipart_keepalive: 10s
diff --git a/debian/frostfs-s3-gw.install b/debian/frostfs-s3-gw.install
index 7e4b6e1da..d87f93518 100644
--- a/debian/frostfs-s3-gw.install
+++ b/debian/frostfs-s3-gw.install
@@ -1,4 +1,4 @@
-config/config.yaml etc/frostfs/s3
+config/config.yml etc/frostfs/s3
 config/rules.json var/lib/frostfs/s3
 bin/frostfs-s3-gw usr/bin
 bin/frostfs-s3-authmate usr/bin
diff --git a/debian/frostfs-s3-gw.postinst b/debian/frostfs-s3-gw.postinst
index 117b88273..21acee620 100755
--- a/debian/frostfs-s3-gw.postinst
+++ b/debian/frostfs-s3-gw.postinst
@@ -24,9 +24,9 @@ case "$1" in
         id -u frostfs-$USERNAME >/dev/null 2>&1 || useradd -s /usr/sbin/nologin -d /var/lib/frostfs/s3 --system -M -U -c "FrostFS S3 gateway" frostfs-$USERNAME
         if ! dpkg-statoverride --list /etc/frostfs/$USERNAME >/dev/null; then
             chown -f -R root:frostfs-$USERNAME /etc/frostfs/$USERNAME
-            chown -f root:frostfs-$USERNAME /etc/frostfs/$USERNAME/config.yaml || true
+            chown -f root:frostfs-$USERNAME /etc/frostfs/$USERNAME/config.yml || true
             chmod -f 0750 /etc/frostfs/$USERNAME
-            chmod -f 0640 /etc/frostfs/$USERNAME/config.yaml || true
+            chmod -f 0640 /etc/frostfs/$USERNAME/config.yml || true
         fi
         USERDIR=$(getent passwd "frostfs-$USERNAME" | cut -d: -f6)
         if ! dpkg-statoverride --list frostfs-"$USERDIR" >/dev/null; then
diff --git a/debian/frostfs-s3-gw.service b/debian/frostfs-s3-gw.service
index baad2d10e..027bb0534 100644
--- a/debian/frostfs-s3-gw.service
+++ b/debian/frostfs-s3-gw.service
@@ -4,7 +4,7 @@ Requires=network.target
 
 [Service]
 Type=simple
-ExecStart=/usr/bin/frostfs-s3-gw --config /etc/frostfs/s3/config.yaml
+ExecStart=/usr/bin/frostfs-s3-gw --config /etc/frostfs/s3/config.yml
 User=frostfs-s3
 Group=frostfs-s3
 WorkingDirectory=/var/lib/frostfs/s3
diff --git a/docs/configuration.md b/docs/configuration.md
index 695109cdb..14bd27248 100644
--- a/docs/configuration.md
+++ b/docs/configuration.md
@@ -101,13 +101,13 @@ Pprof and Prometheus are integrated into the gateway. To enable them, use `--ppr
 
 ## YAML file and environment variables
 
-Example of a YAML configuration file: [yaml-example](/config/config.yaml)
+Example of a YAML configuration file: [yaml-example](/config/config.yml)
 Examples of environment variables: [env-example](/config/config.env).
 
 A path to a configuration file can be specified with `--config` parameter:
 
 ```shell
-$ frostfs-s3-gw --config your-config.yaml
+$ frostfs-s3-gw --config your-config.yml
 ```
 
 ### Multiple configs
@@ -118,13 +118,13 @@ You can either provide several files with repeating `--config` flag or provide p
 Also, you can combine these flags:
 
 ```shell
-$ frostfs-s3-gw --config ./config/config.yaml --config /your/partial/config.yaml --config-dir ./config/dir
+$ frostfs-s3-gw --config ./config/config.yml --config /your/partial/config.yml --config-dir ./config/dir
 ```
 
 **Note:** next file in `--config` flag overwrites values from the previous one.
 Files from `--config-dir` directory overwrite values from `--config` files.
-So the command above run `frostfs-s3-gw` to listen on `0.0.0.0:8080` address (value from `./config/config.yaml`),
-applies parameters from `/your/partial/config.yaml`,
+So the command above run `frostfs-s3-gw` to listen on `0.0.0.0:8080` address (value from `./config/config.yml`),
+applies parameters from `/your/partial/config.yml`,
 enable pprof (value from `./config/dir/pprof.yaml`) and prometheus (value from `./config/dir/prometheus.yaml`).
 
 ### Reload on SIGHUP
@@ -141,7 +141,7 @@ $ kill -s SIGHUP <app_pid>
 Example:
 
 ```shell
-$ ./bin/frostfs-s3-gw --config config.yaml  &> s3.log &
+$ ./bin/frostfs-s3-gw --config config.yml  &> s3.log &
 [1] 998346
 
 $ cat s3.log