diff --git a/atcoder-problems-backend/Cargo.lock b/atcoder-problems-backend/Cargo.lock
index 7ce8a312..50c0b2f7 100644
--- a/atcoder-problems-backend/Cargo.lock
+++ b/atcoder-problems-backend/Cargo.lock
@@ -8,7 +8,7 @@ version = "0.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "57a7559404a7f3573127aab53c08ce37a6c6a315c374a31070f3c91cd1b4a7fe"
 dependencies = [
- "bitflags",
+ "bitflags 1.3.2",
  "bytes",
  "futures-core",
  "futures-sink",
@@ -31,7 +31,7 @@ dependencies = [
  "actix-utils",
  "ahash 0.8.3",
  "base64 0.21.0",
- "bitflags",
+ "bitflags 1.3.2",
  "brotli",
  "bytes",
  "bytestring",
@@ -566,6 +566,12 @@ version = "1.3.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "bef38d45163c2f1dde094a7dfd33ccf595c92905c8f8f4fdc18d06fb1037718a"
 
+[[package]]
+name = "bitflags"
+version = "2.4.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "327762f6e5a765692301e5bb513e0d9fef63be86bbc14528052b1cd3e6f03e07"
+
 [[package]]
 name = "block-buffer"
 version = "0.10.4"
@@ -1960,11 +1966,11 @@ checksum = "b7e5500299e16ebb147ae15a00a942af264cf3688f47923b8fc2cd5858f23ad3"
 
 [[package]]
 name = "openssl"
-version = "0.10.51"
+version = "0.10.60"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "97ea2d98598bf9ada7ea6ee8a30fb74f9156b63bbe495d64ec2b87c269d2dda3"
+checksum = "79a4c6c3a2b158f7f8f2a2fc5a969fa3a068df6fc9dbb4a43845436e3af7c800"
 dependencies = [
- "bitflags",
+ "bitflags 2.4.1",
  "cfg-if",
  "foreign-types",
  "libc",
@@ -1992,9 +1998,9 @@ checksum = "ff011a302c396a5197692431fc1948019154afc178baf7d8e37367442a4601cf"
 
 [[package]]
 name = "openssl-sys"
-version = "0.9.86"
+version = "0.9.96"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "992bac49bdbab4423199c654a5515bd2a6c6a23bf03f2dd3bdb7e5ae6259bc69"
+checksum = "3812c071ba60da8b5677cc12bcb1d42989a65553772897a7e0355545a819838f"
 dependencies = [
  "cc",
  "libc",
@@ -2231,7 +2237,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "4b2d323e8ca7996b3e23126511a523f7e62924d93ecd5ae73b333815b0eb3dce"
 dependencies = [
  "autocfg",
- "bitflags",
+ "bitflags 1.3.2",
  "cfg-if",
  "concurrent-queue",
  "libc",
@@ -2379,7 +2385,7 @@ version = "0.2.16"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "fb5a58c1855b4b6819d59012155603f0b22ad30cad752600aadfcb695265519a"
 dependencies = [
- "bitflags",
+ "bitflags 1.3.2",
 ]
 
 [[package]]
@@ -2388,7 +2394,7 @@ version = "0.3.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "567664f262709473930a4bf9e51bf2ebf3348f2e748ccc50dea20646858f8f29"
 dependencies = [
- "bitflags",
+ "bitflags 1.3.2",
 ]
 
 [[package]]
@@ -2538,7 +2544,7 @@ version = "0.37.14"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d9b864d3c18a5785a05953adeed93e2dca37ed30f18e69bba9f30079d51f363f"
 dependencies = [
- "bitflags",
+ "bitflags 1.3.2",
  "errno",
  "io-lifetimes",
  "libc",
@@ -2651,7 +2657,7 @@ version = "2.8.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "a332be01508d814fed64bf28f798a146d73792121129962fdf335bb3c49a4254"
 dependencies = [
- "bitflags",
+ "bitflags 1.3.2",
  "core-foundation",
  "core-foundation-sys",
  "libc",
@@ -2674,7 +2680,7 @@ version = "0.24.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "0c37578180969d00692904465fb7f6b3d50b9a2b952b87c23d0e2e5cb5013416"
 dependencies = [
- "bitflags",
+ "bitflags 1.3.2",
  "cssparser",
  "derive_more",
  "fxhash",
@@ -2915,7 +2921,7 @@ dependencies = [
  "ahash 0.7.6",
  "atoi",
  "base64 0.13.1",
- "bitflags",
+ "bitflags 1.3.2",
  "byteorder",
  "bytes",
  "crc",