diff --git a/Documentation/BuildInstructions.md b/Documentation/BuildInstructions.md
index b85fa498641..02549eabfa3 100644
--- a/Documentation/BuildInstructions.md
+++ b/Documentation/BuildInstructions.md
@@ -11,9 +11,9 @@ sudo apt install build-essential cmake curl libmpfr-dev libmpc-dev libgmp-dev e2
 ```
 Optional: `fuse2fs` for [building images without root](https://github.com/SerenityOS/serenity/pull/11224).
 
-#### GCC 12 or Clang 15
+#### GCC 12 or Clang 17
 
-A host compiler that supports C++23 features is required for building host tools, the newer the better. Tested versions include gcc-12 and clang-15.
+A host compiler that supports C++23 features is required for building host tools, the newer the better. Tested versions include gcc-12 and clang-17.
 
 On Ubuntu gcc-12 is available in the repositories of 22.04 (Jammy) and later.
 If you are running an older version, you will either need to upgrade, or find an alternative installation source.
diff --git a/Documentation/BuildInstructionsLadybird.md b/Documentation/BuildInstructionsLadybird.md
index 69487300690..57bcb5ab88c 100644
--- a/Documentation/BuildInstructionsLadybird.md
+++ b/Documentation/BuildInstructionsLadybird.md
@@ -2,7 +2,7 @@
 
 ## Build Prerequisites
 
-Qt6 development packages and a C++23 capable compiler are required. g++-12 or clang-15 are required at a minimum for c++23 support.
+Qt6 development packages and a C++23 capable compiler are required. g++-12 or clang-17 are required at a minimum for c++23 support.
 
 NOTE: In all of the below lists of packages, the Qt6 multimedia package is not needed if your Linux system supports PulseAudio.
 
@@ -69,7 +69,7 @@ On OpenIndiana:
 Note that OpenIndiana's latest GCC port (GCC 11) is too old to build Ladybird, so you need Clang, which is available in the repository.
 
 ```
-pfexec pkg install cmake ninja clang-15 libglvnd qt6
+pfexec pkg install cmake ninja clang-17 libglvnd qt6
 ```
 
 On Haiku:
diff --git a/Meta/Lagom/BuildFuzzers.sh b/Meta/Lagom/BuildFuzzers.sh
index d31890f2eba..0f01928da42 100755
--- a/Meta/Lagom/BuildFuzzers.sh
+++ b/Meta/Lagom/BuildFuzzers.sh
@@ -14,7 +14,7 @@ die() {
 
 pick_clang() {
     local BEST_VERSION=0
-    for CLANG_CANDIDATE in clang clang-15 clang-16 clang-17 clang-18 /opt/homebrew/opt/llvm/bin/clang ; do
+    for CLANG_CANDIDATE in clang clang-17 clang-18 /opt/homebrew/opt/llvm/bin/clang ; do
         if ! command -v $CLANG_CANDIDATE >/dev/null 2>&1; then
             continue
         fi
diff --git a/Meta/Lagom/Tools/LibJSGCVerifier/CMakeLists.txt b/Meta/Lagom/Tools/LibJSGCVerifier/CMakeLists.txt
index 3e390878649..7c6c55d6d19 100644
--- a/Meta/Lagom/Tools/LibJSGCVerifier/CMakeLists.txt
+++ b/Meta/Lagom/Tools/LibJSGCVerifier/CMakeLists.txt
@@ -5,7 +5,7 @@ project(LibJSGCVerifier C CXX)
 set(LAGOM_BUILD OFF CACHE BOOL "Build without the serenity toolchain Clang")
 
 if (LAGOM_BUILD)
-    find_package(Clang 16 CONFIG REQUIRED)
+    find_package(Clang 17 CONFIG REQUIRED)
 else()
     find_package(Clang CONFIG REQUIRED HINTS "../../../../Toolchain/Local/clang")
 endif()
diff --git a/Meta/find_compiler.sh b/Meta/find_compiler.sh
index 028f4f055ba..f21d3da3bb4 100644
--- a/Meta/find_compiler.sh
+++ b/Meta/find_compiler.sh
@@ -56,7 +56,7 @@ pick_host_compiler() {
         return
     fi
 
-    find_newest_compiler clang clang-15 clang-16 clang-17 clang-18 /opt/homebrew/opt/llvm/bin/clang
+    find_newest_compiler clang clang-17 clang-18 /opt/homebrew/opt/llvm/bin/clang
     if is_supported_compiler "$HOST_COMPILER"; then
         export CC="${HOST_COMPILER}"
         export CXX="${HOST_COMPILER/clang/clang++}"
@@ -71,8 +71,8 @@ pick_host_compiler() {
     fi
 
     if [ "$(uname -s)" = "Darwin" ]; then
-        die "Please make sure that Xcode 14.3, Homebrew Clang 15, or higher is installed."
+        die "Please make sure that Xcode 14.3, Homebrew Clang 17, or higher is installed."
     else
-        die "Please make sure that GCC version 12, Clang version 15, or higher is installed."
+        die "Please make sure that GCC version 12, Clang version 17, or higher is installed."
     fi
 }