diff --git a/Cargo.lock b/Cargo.lock
index 3ffac6c..96a66c4 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -53,11 +53,11 @@ dependencies = [
  "derive-new 0.5.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "derive_more 0.99.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "either 1.5.3 (registry+https://github.com/rust-lang/crates.io-index)",
- "euclid 0.20.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "euclid 0.20.7 (registry+https://github.com/rust-lang/crates.io-index)",
  "fixedbitset 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "getrandom 0.1.13 (registry+https://github.com/rust-lang/crates.io-index)",
  "if_chain 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "im-rc 14.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "im-rc 14.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "indexmap 1.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "itertools 0.8.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "itertools-num 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -96,7 +96,7 @@ dependencies = [
  "regex 1.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "rustc-hash 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "smallvec 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "strsim 0.9.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "strsim 0.9.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "superslice 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "take_mut 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "text_io 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -190,7 +190,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "euclid"
-version = "0.20.5"
+version = "0.20.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "num-traits 0.2.10 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -254,7 +254,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "im-rc"
-version = "14.0.0"
+version = "14.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "bitmaps 2.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -933,7 +933,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "strsim"
-version = "0.9.2"
+version = "0.9.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -1062,7 +1062,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "checksum derive-new 0.5.8 (registry+https://github.com/rust-lang/crates.io-index)" = "71f31892cd5c62e414316f2963c5689242c43d8e7bbcaaeca97e5e28c95d91d9"
 "checksum derive_more 0.99.2 (registry+https://github.com/rust-lang/crates.io-index)" = "2159be042979966de68315bce7034bb000c775f22e3e834e1c52ff78f041cae8"
 "checksum either 1.5.3 (registry+https://github.com/rust-lang/crates.io-index)" = "bb1f6b1ce1c140482ea30ddd3335fc0024ac7ee112895426e0a629a6c20adfe3"
-"checksum euclid 0.20.5 (registry+https://github.com/rust-lang/crates.io-index)" = "a8813df82772c5ef4c2e9cd4a986773c125ffeafdc08204c9d5c2f06e0abdc17"
+"checksum euclid 0.20.7 (registry+https://github.com/rust-lang/crates.io-index)" = "3f852d320142e1cceb15dccef32ed72a9970b83109d8a4e24b1ab04d579f485d"
 "checksum fixedbitset 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)" = "86d4de0081402f5e88cdac65c8dcdcc73118c1a7a465e2a05f0da05843a8ea33"
 "checksum fixedbitset 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "37ab347416e802de484e4d03c7316c48f1ecb56574dfd4a46a80f173ce1de04d"
 "checksum fs_extra 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "5f2a4a2034423744d2cc7ca2068453168dcdb82c438419e639a26bd87839c674"
@@ -1072,7 +1072,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "checksum hamming 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)" = "65043da274378d68241eb9a8f8f8aa54e349136f7b8e12f63e3ef44043cc30e1"
 "checksum heck 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)" = "20564e78d53d2bb135c343b3f47714a56af2061f1c928fdb541dc7b9fdd94205"
 "checksum if_chain 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)" = "c3360c7b59e5ffa2653671fb74b4741a5d343c03f331c0a4aeda42b5c2b0ec7d"
-"checksum im-rc 14.0.0 (registry+https://github.com/rust-lang/crates.io-index)" = "e9ad726dce25993be6352b0bff048e4d2647440c0a673d32257c4fac49356d18"
+"checksum im-rc 14.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "ed5135086ffe74654d797c02fd673c4046cdb7f552c98f1b1aa6851d6572f84f"
 "checksum indexmap 1.3.0 (registry+https://github.com/rust-lang/crates.io-index)" = "712d7b3ea5827fcb9d4fda14bf4da5f136f0db2ae9c8f4bd4e2d1c6fde4e6db2"
 "checksum itertools 0.8.2 (registry+https://github.com/rust-lang/crates.io-index)" = "f56a2d0bc861f9165be4eb3442afd3c236d8a98afd426f65d92324ae1091a484"
 "checksum itertools-num 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)" = "a872a22f9e6f7521ca557660adb96dd830e54f0f490fa115bb55dd69d38b27e7"
@@ -1152,7 +1152,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "checksum smallvec 0.6.13 (registry+https://github.com/rust-lang/crates.io-index)" = "f7b0758c52e15a8b5e3691eae6cc559f08eee9406e548a4477ba4e67770a82b6"
 "checksum smallvec 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)" = "4ecf3b85f68e8abaa7555aa5abdb1153079387e60b718283d732f03897fcfc86"
 "checksum static_assertions 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)" = "7f3eb36b47e512f8f1c9e3d10c2c1965bc992bd9cdb024fa581e2194501c83d3"
-"checksum strsim 0.9.2 (registry+https://github.com/rust-lang/crates.io-index)" = "032c03039aae92b350aad2e3779c352e104d919cb192ba2fabbd7b831ce4f0f6"
+"checksum strsim 0.9.3 (registry+https://github.com/rust-lang/crates.io-index)" = "6446ced80d6c486436db5c078dde11a9f73d42b57fb273121e160b84f63d894c"
 "checksum superslice 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)" = "ab16ced94dbd8a46c82fd81e3ed9a8727dac2977ea869d217bcc4ea1f122e81f"
 "checksum syn 0.15.44 (registry+https://github.com/rust-lang/crates.io-index)" = "9ca4b3b69a77cbe1ffc9e198781b7acb0c7365a883670e8f1c1bc66fba79a5c5"
 "checksum syn 1.0.11 (registry+https://github.com/rust-lang/crates.io-index)" = "dff0acdb207ae2fe6d5976617f887eb1e35a2ba52c13c7234c790960cdad9238"
diff --git a/Cargo.toml b/Cargo.toml
index 88704c5..a2ade72 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -58,7 +58,7 @@ rand_distr = "=0.2.2"
 petgraph = "=0.4.13"
 
 # 幾何
-euclid = "=0.20.5"
+euclid = "=0.20.7"
 
 # 素数
 primal = "=0.2.3"
@@ -79,7 +79,7 @@ nom = "=5.0.1"
 aho-corasick = "=0.7.6"
 
 # string similarity metrics
-strsim = "=0.9.2"
+strsim = "=0.9.3"
 
 # staticアイテムの遅延初期化
 lazy_static = "=1.4.0"
@@ -131,7 +131,7 @@ either = "=1.5.3"
 # 標準ライブラリのVecやHashMapに対応する永続データ構造
 # 永続データ構造は関数型言語によく見られるデータ構造で、要素を更新しても、そのデータ構造の
 # 以前のバージョンにアクセスできる。（更新の度に差分が記録されていくイメージ）
-im-rc = "=14.0.0"
+im-rc = "=14.1.0"
 
 # 可変長bit set。
 fixedbitset = "=0.2.0"