diff --git a/Cargo.lock b/Cargo.lock
index c7b25bab..d9a1d318 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -113,6 +113,16 @@ dependencies = [
  "generic-array",
 ]
 
+[[package]]
+name = "bstr"
+version = "1.6.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6798148dccfbff0fae41c7574d2fa8f1ef3492fba0face179de5d8d447d67b05"
+dependencies = [
+ "memchr",
+ "serde",
+]
+
 [[package]]
 name = "bumpalo"
 version = "3.13.0"
@@ -149,9 +159,9 @@ dependencies = [
 
 [[package]]
 name = "cargo_metadata"
-version = "0.17.0"
+version = "0.18.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e7daec1a2a2129eeba1644b220b4647ec537b0b5d4bfd6876fcc5a540056b592"
+checksum = "2d886547e41f740c616ae73108f6eb70afe6d940c7bc697cb30f13daec073037"
 dependencies = [
  "camino",
  "cargo-platform",
@@ -242,7 +252,7 @@ dependencies = [
  "sha2",
  "tempfile",
  "thiserror",
- "toml",
+ "toml 0.7.6",
  "walkdir",
  "which_problem",
 ]
@@ -460,6 +470,19 @@ version = "0.3.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d2fabcfbdc87f4758337ca535fb41a6d701b65693ce38287d856d1674551ec9b"
 
+[[package]]
+name = "globset"
+version = "0.4.13"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "759c97c1e17c55525b57192c06a267cda0ac5210b222d6b82189a2338fa1c13d"
+dependencies = [
+ "aho-corasick",
+ "bstr",
+ "fnv",
+ "log",
+ "regex",
+]
+
 [[package]]
 name = "hashbrown"
 version = "0.14.0"
@@ -497,11 +520,20 @@ dependencies = [
  "tar",
  "tempfile",
  "thiserror",
- "toml",
+ "toml 0.7.6",
  "ureq",
  "url",
 ]
 
+[[package]]
+name = "home"
+version = "0.5.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5444c27eef6923071f7ebcc33e3444508466a76f7a2b93da00ed6e19f30c1ddb"
+dependencies = [
+ "windows-sys",
+]
+
 [[package]]
 name = "idna"
 version = "0.4.0"
@@ -512,6 +544,23 @@ dependencies = [
  "unicode-normalization",
 ]
 
+[[package]]
+name = "ignore"
+version = "0.4.20"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "dbe7873dab538a9a44ad79ede1faf5f30d49f9a5c883ddbab48bce81b64b7492"
+dependencies = [
+ "globset",
+ "lazy_static",
+ "log",
+ "memchr",
+ "regex",
+ "same-file",
+ "thread_local",
+ "walkdir",
+ "winapi-util",
+]
+
 [[package]]
 name = "indexmap"
 version = "2.0.0"
@@ -569,55 +618,70 @@ checksum = "e2abad23fbc42b3700f2f279844dc832adb2b2eb069b2df918f455c4e18cc646"
 
 [[package]]
 name = "libc"
-version = "0.2.147"
+version = "0.2.149"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b4668fb0ea861c1df094127ac5f1da3409a82116a4ba74fca2e58ef927159bb3"
+checksum = "a08173bc88b7955d1b3145aa561539096c421ac8debde8cbc3612ec635fee29b"
 
 [[package]]
 name = "libcnb"
-version = "0.14.0"
+version = "0.15.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5132851c82d808e6b42edd1cc9e7cb9b16b0274c325b25fdb42660fae9b2e88b"
+checksum = "460e3b9d5b51eee9b9eb154e8bece15b77fff8b287457c09699a609c977003c9"
 dependencies = [
+ "libcnb-common",
  "libcnb-data",
  "libcnb-proc-macros",
  "serde",
  "thiserror",
- "toml",
+ "toml 0.8.2",
+]
+
+[[package]]
+name = "libcnb-common"
+version = "0.15.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "53c4c77089f294316c1d8a285d0ed9973e796a2653c676b22b3f7703d73aa828"
+dependencies = [
+ "serde",
+ "thiserror",
+ "toml 0.8.2",
 ]
 
 [[package]]
 name = "libcnb-data"
-version = "0.14.0"
+version = "0.15.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4bed8b0f2676aebeb216a7f7872151fbf74ff3706c7027449573c03c9d7f3393"
+checksum = "7f35c4af3b47b67257263f0504897cf4db263b407b3e367971fc0b60ada69ce2"
 dependencies = [
  "fancy-regex",
  "libcnb-proc-macros",
  "serde",
  "thiserror",
- "toml",
+ "toml 0.8.2",
  "uriparse",
 ]
 
 [[package]]
 name = "libcnb-package"
-version = "0.14.0"
+version = "0.15.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "412f8c3ee7e2fcaff1acd1926a238cac271e86d7258c51038053fac17d85d144"
+checksum = "d5ee4c1ac95fc5f71b0f8901d62644f9d39dad0be9d1a5bf23fae173aaf2a46c"
 dependencies = [
  "cargo_metadata",
+ "ignore",
+ "libcnb-common",
  "libcnb-data",
  "petgraph",
- "toml",
+ "thiserror",
+ "uriparse",
  "which",
 ]
 
 [[package]]
 name = "libcnb-proc-macros"
-version = "0.14.0"
+version = "0.15.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c715cec438b3a02c3564e9b9c20a78c54b9c71874249bec1e3d45fcd2537cfcf"
+checksum = "5effc8c71a7401899ea2885681b213b779449dc0f581663ea850d9de0718434c"
 dependencies = [
  "cargo_metadata",
  "fancy-regex",
@@ -627,13 +691,13 @@ dependencies = [
 
 [[package]]
 name = "libcnb-test"
-version = "0.14.0"
+version = "0.15.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "92ee152780ab4ad6e4aca8ec12767c090677294b7aa4ffc1a90633d38b429c9e"
+checksum = "b88d0682a1abd6261f406f52214272c09738ddae239cc5d38159dfa7a53e2e63"
 dependencies = [
- "cargo_metadata",
  "fastrand",
  "fs_extra",
+ "libcnb-common",
  "libcnb-data",
  "libcnb-package",
  "tempfile",
@@ -641,9 +705,9 @@ dependencies = [
 
 [[package]]
 name = "libherokubuildpack"
-version = "0.14.0"
+version = "0.15.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "999689d1a9f8cbea478ae7c4ce6136601e7abe9512ccfc0409f5525949a41457"
+checksum = "2c01b437767257854de9a8011c6f7e265dc6ebc344cc122ffef2464f3e10bfc8"
 dependencies = [
  "crossbeam-utils",
  "flate2",
@@ -653,7 +717,7 @@ dependencies = [
  "tar",
  "termcolor",
  "thiserror",
- "toml",
+ "toml 0.8.2",
  "ureq",
 ]
 
@@ -670,9 +734,9 @@ dependencies = [
 
 [[package]]
 name = "linux-raw-sys"
-version = "0.4.5"
+version = "0.4.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "57bcfdad1b858c2db7c38303a6d2ad4dfaf5eb53dfeb0910128b2c26d6158503"
+checksum = "da2479e8c062e40bf0066ffa0bc823de0a9368974af99c9f6df941d2c231e03f"
 
 [[package]]
 name = "log"
@@ -774,9 +838,9 @@ checksum = "5b40af805b3121feab8a3c29f04d8ad262fa8e0561883e7653e024ae4479e6de"
 
 [[package]]
 name = "proc-macro2"
-version = "1.0.66"
+version = "1.0.69"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "18fb31db3f9bddb2ea821cde30a9f70117e3f119938b5ee630b7403aa6e2ead9"
+checksum = "134c189feb4956b20f6f547d2cf727d4c0fe06722b20a0eec87ed445a97f92da"
 dependencies = [
  "unicode-ident",
 ]
@@ -897,9 +961,9 @@ dependencies = [
 
 [[package]]
 name = "rustix"
-version = "0.38.9"
+version = "0.38.20"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9bfe0f2582b4931a45d1fa608f8a8722e8b3c7ac54dd6d5f3b3212791fedef49"
+checksum = "67ce50cb2e16c2903e30d1cbccfd8387a74b9d4c938b6a4c5ec6cc7556f7a8a0"
 dependencies = [
  "bitflags 2.4.0",
  "errno",
@@ -1045,9 +1109,9 @@ checksum = "73473c0e59e6d5812c5dfe2a064a6444949f089e20eec9a2e5506596494e4623"
 
 [[package]]
 name = "syn"
-version = "2.0.29"
+version = "2.0.38"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c324c494eba9d92503e6f1ef2e6df781e78f6a7705a0202d9801b198807d518a"
+checksum = "e96b79aaa137db8f61e26363a0c9b47d8b4ec75da28b7d1d614c2303e232408b"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -1080,33 +1144,43 @@ dependencies = [
 
 [[package]]
 name = "termcolor"
-version = "1.2.0"
+version = "1.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "be55cf8942feac5c765c2c993422806843c9a9a45d4d5c407ad6dd2ea95eb9b6"
+checksum = "6093bad37da69aab9d123a8091e4be0aa4a03e4d601ec641c327398315f62b64"
 dependencies = [
  "winapi-util",
 ]
 
 [[package]]
 name = "thiserror"
-version = "1.0.47"
+version = "1.0.50"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "97a802ec30afc17eee47b2855fc72e0c4cd62be9b4efe6591edde0ec5bd68d8f"
+checksum = "f9a7210f5c9a7156bb50aa36aed4c95afb51df0df00713949448cf9e97d382d2"
 dependencies = [
  "thiserror-impl",
 ]
 
 [[package]]
 name = "thiserror-impl"
-version = "1.0.47"
+version = "1.0.50"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6bb623b56e39ab7dcd4b1b98bb6c8f8d907ed255b18de254088016b27a8ee19b"
+checksum = "266b2e40bc00e5a6c09c3584011e08b06f123c00362c92b975ba9843aaaa14b8"
 dependencies = [
  "proc-macro2",
  "quote",
  "syn",
 ]
 
+[[package]]
+name = "thread_local"
+version = "1.1.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3fdd6f064ccff2d6567adcb3873ca630700f00b5ad3f060c25b5dcfd9a4ce152"
+dependencies = [
+ "cfg-if",
+ "once_cell",
+]
+
 [[package]]
 name = "tinyvec"
 version = "1.6.0"
@@ -1131,7 +1205,19 @@ dependencies = [
  "serde",
  "serde_spanned",
  "toml_datetime",
- "toml_edit",
+ "toml_edit 0.19.14",
+]
+
+[[package]]
+name = "toml"
+version = "0.8.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "185d8ab0dfbb35cf1399a6344d8484209c088f75f8f68230da55d48d95d43e3d"
+dependencies = [
+ "serde",
+ "serde_spanned",
+ "toml_datetime",
+ "toml_edit 0.20.2",
 ]
 
 [[package]]
@@ -1156,6 +1242,19 @@ dependencies = [
  "winnow",
 ]
 
+[[package]]
+name = "toml_edit"
+version = "0.20.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "396e4d48bbb2b7554c944bde63101b5ae446cff6ec4a24227428f15eb72ef338"
+dependencies = [
+ "indexmap",
+ "serde",
+ "serde_spanned",
+ "toml_datetime",
+ "winnow",
+]
+
 [[package]]
 name = "typenum"
 version = "1.16.0"
@@ -1341,13 +1440,14 @@ dependencies = [
 
 [[package]]
 name = "which"
-version = "4.4.0"
+version = "4.4.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2441c784c52b289a054b7201fc93253e288f094e2f4be9058343127c4226a269"
+checksum = "87ba24419a2078cd2b0f2ede2691b6c66d8e47836da3b6db8265ebad47afbfc7"
 dependencies = [
  "either",
- "libc",
+ "home",
  "once_cell",
+ "rustix",
 ]
 
 [[package]]
diff --git a/buildpacks/ruby/Cargo.toml b/buildpacks/ruby/Cargo.toml
index 32c24100..5b8e95f6 100644
--- a/buildpacks/ruby/Cargo.toml
+++ b/buildpacks/ruby/Cargo.toml
@@ -14,8 +14,8 @@ glob = "0.3"
 indoc = "2"
 # libcnb has a much bigger impact on buildpack behaviour than any other dependencies,
 # so it's pinned to an exact version to isolate it from lockfile refreshes.
-libcnb = "=0.14.0"
-libherokubuildpack = "=0.14.0"
+libcnb = "=0.15.0"
+libherokubuildpack = "=0.15.0"
 rand = "0.8"
 regex = "1"
 serde = "1"
@@ -27,5 +27,5 @@ url = "2"
 clap = { version = "4", features = ["derive"] }
 
 [dev-dependencies]
-libcnb-test = "=0.14.0"
+libcnb-test = "=0.15.0"
 toml = "0.7"
diff --git a/commons/Cargo.toml b/commons/Cargo.toml
index 2a73c338..56b874a0 100644
--- a/commons/Cargo.toml
+++ b/commons/Cargo.toml
@@ -14,8 +14,8 @@ indoc = "2"
 lazy_static = "1"
 # libcnb has a much bigger impact on buildpack behaviour than any other dependencies,
 # so it's pinned to an exact version to isolate it from lockfile refreshes.
-libcnb = "=0.14.0"
-libherokubuildpack = "=0.14.0"
+libcnb = "=0.15.0"
+libherokubuildpack = "=0.15.0"
 regex = "1"
 serde = "1"
 sha2 = "0.10"