diff --git a/README.md b/README.md
index 32b53aacb53..9f4b6f1457d 100644
--- a/README.md
+++ b/README.md
@@ -44,11 +44,11 @@ Prerequisites:
 * Qt WebEngine module for QtWebEngine based help viewer
 * On Windows:
     * MinGW with GCC 9 or Visual Studio 2019 or later
-    * Python 3.5 or later (optional, needed for the python enabled debug helper)
+    * Python 3.8 or later (optional, needed for the python enabled debug helper)
     * Debugging Tools for Windows (optional, for MSVC debugging support with CDB)
 * On Mac OS X: latest Xcode
 * On Linux: GCC 9 or later
-* LLVM/Clang 10 or later (optional, LLVM/Clang 14 is recommended.
+* LLVM/Clang 14 or later (optional, LLVM/Clang 17 is recommended.
   See [instructions](#getting-llvmclang-for-the-clang-code-model) on how to
   get LLVM.
   The ClangFormat plugin uses the LLVM C++ API.
diff --git a/qbs/modules/libclang/functions.js b/qbs/modules/libclang/functions.js
index c1cd5c237e9..0d3c5afb87a 100644
--- a/qbs/modules/libclang/functions.js
+++ b/qbs/modules/libclang/functions.js
@@ -1,7 +1,7 @@
 var Environment = require("qbs.Environment")
 var File = require("qbs.File")
 var FileInfo = require("qbs.FileInfo")
-var MinimumLLVMVersion = "8.0.0" // CLANG-UPGRADE-CHECK: Adapt minimum version numbers.
+var MinimumLLVMVersion = "14.0.0" // CLANG-UPGRADE-CHECK: Adapt minimum version numbers.
 var Process = require("qbs.Process")
 var Utilities = require("qbs.Utilities")
 
diff --git a/src/plugins/clangformat/CMakeLists.txt b/src/plugins/clangformat/CMakeLists.txt
index f1dc569333f..30bc50dd2c3 100644
--- a/src/plugins/clangformat/CMakeLists.txt
+++ b/src/plugins/clangformat/CMakeLists.txt
@@ -1,5 +1,5 @@
 add_qtc_plugin(ClangFormat
-  CONDITION TARGET ${CLANG_FORMAT_LIB} AND LLVM_PACKAGE_VERSION VERSION_GREATER_EQUAL 10.0.0 AND (QTC_CLANG_BUILDMODE_MATCH OR CLANGTOOLING_LINK_CLANG_DYLIB)
+  CONDITION TARGET ${CLANG_FORMAT_LIB} AND LLVM_PACKAGE_VERSION VERSION_GREATER_EQUAL 14.0.0 AND (QTC_CLANG_BUILDMODE_MATCH OR CLANGTOOLING_LINK_CLANG_DYLIB)
   DEPENDS Utils Qt::Widgets ${CLANG_FORMAT_LIB}
   PLUGIN_DEPENDS Core TextEditor CppEditor ProjectExplorer
   SOURCES
diff --git a/src/plugins/clangformat/clangformatbaseindenter.cpp b/src/plugins/clangformat/clangformatbaseindenter.cpp
index 2de357b1124..1d5dc2730c3 100644
--- a/src/plugins/clangformat/clangformatbaseindenter.cpp
+++ b/src/plugins/clangformat/clangformatbaseindenter.cpp
@@ -42,11 +42,7 @@ static void adjustFormatStyleForLineBreak(clang::format::FormatStyle &style,
                                           ReplacementsToKeep replacementsToKeep)
 {
     style.MaxEmptyLinesToKeep = 100;
-#if LLVM_VERSION_MAJOR >= 13
     style.SortIncludes = clang::format::FormatStyle::SI_Never;
-#else
-    style.SortIncludes = false;
-#endif
 #if LLVM_VERSION_MAJOR >= 16
     style.SortUsingDeclarations = clang::format::FormatStyle::SUD_Never;
 #else
diff --git a/src/plugins/clangformat/clangformatutils.cpp b/src/plugins/clangformat/clangformatutils.cpp
index 6d16ebe9aa1..4036d34f6dc 100644
--- a/src/plugins/clangformat/clangformatutils.cpp
+++ b/src/plugins/clangformat/clangformatutils.cpp
@@ -42,37 +42,22 @@ clang::format::FormatStyle calculateQtcStyle()
 #if LLVM_VERSION_MAJOR >= 15
     style.AlignConsecutiveAssignments = {false, false, false, false, false};
     style.AlignConsecutiveDeclarations = {false, false, false, false, false};
-#elif LLVM_VERSION_MAJOR >= 12
+#else
     style.AlignConsecutiveAssignments = FormatStyle::ACS_None;
     style.AlignConsecutiveDeclarations = FormatStyle::ACS_None;
-#else
-    style.AlignConsecutiveAssignments = false;
-    style.AlignConsecutiveDeclarations = false;
 #endif
     style.AlignEscapedNewlines = FormatStyle::ENAS_DontAlign;
-#if LLVM_VERSION_MAJOR >= 11
     style.AlignOperands = FormatStyle::OAS_Align;
-#else
-    style.AlignOperands = true;
-#endif
 #if LLVM_VERSION_MAJOR >= 16
     style.AlignTrailingComments = {FormatStyle::TCAS_Always, 0};
 #else
     style.AlignTrailingComments = true;
 #endif
     style.AllowAllParametersOfDeclarationOnNextLine = true;
-#if LLVM_VERSION_MAJOR >= 10
     style.AllowShortBlocksOnASingleLine = FormatStyle::SBS_Never;
-#else
-    style.AllowShortBlocksOnASingleLine = false;
-#endif
     style.AllowShortCaseLabelsOnASingleLine = false;
     style.AllowShortFunctionsOnASingleLine = FormatStyle::SFS_Inline;
-#if LLVM_VERSION_MAJOR >= 9
     style.AllowShortIfStatementsOnASingleLine = FormatStyle::SIS_Never;
-#else
-    style.AllowShortIfStatementsOnASingleLine = false;
-#endif
     style.AllowShortLoopsOnASingleLine = false;
     style.AlwaysBreakAfterReturnType = FormatStyle::RTBS_None;
     style.AlwaysBreakBeforeMultilineStrings = false;
@@ -80,11 +65,7 @@ clang::format::FormatStyle calculateQtcStyle()
     style.BinPackArguments = false;
     style.BinPackParameters = false;
     style.BraceWrapping.AfterClass = true;
-#if LLVM_VERSION_MAJOR >= 10
     style.BraceWrapping.AfterControlStatement = FormatStyle::BWACS_Never;
-#else
-    style.BraceWrapping.AfterControlStatement = false;
-#endif
     style.BraceWrapping.AfterEnum = false;
     style.BraceWrapping.AfterFunction = true;
     style.BraceWrapping.AfterNamespace = false;
@@ -119,11 +100,7 @@ clang::format::FormatStyle calculateQtcStyle()
     style.ExperimentalAutoDetectBinPacking = false;
     style.FixNamespaceComments = true;
     style.ForEachMacros = {"forever", "foreach", "Q_FOREACH", "BOOST_FOREACH"};
-#if LLVM_VERSION_MAJOR >= 12
     style.IncludeStyle.IncludeCategories = {{"^<Q.*", 200, 200, true}};
-#else
-    style.IncludeStyle.IncludeCategories = {{"^<Q.*", 200, 200}};
-#endif
     style.IncludeStyle.IncludeIsMainRegex = "(Test)?$";
     style.IndentCaseLabels = false;
     style.IndentWidth = 4;
@@ -148,11 +125,7 @@ clang::format::FormatStyle calculateQtcStyle()
     style.PenaltyReturnTypeOnItsOwnLine = 300;
     style.PointerAlignment = FormatStyle::PAS_Right;
     style.ReflowComments = false;
-#if LLVM_VERSION_MAJOR >= 13
     style.SortIncludes = FormatStyle::SI_CaseSensitive;
-#else
-    style.SortIncludes = true;
-#endif
 #if LLVM_VERSION_MAJOR >= 16
     style.SortUsingDeclarations = FormatStyle::SUD_Lexicographic;
 #else
@@ -166,11 +139,7 @@ clang::format::FormatStyle calculateQtcStyle()
     style.SpaceInEmptyParentheses = false;
 #endif
     style.SpacesBeforeTrailingComments = 1;
-#if LLVM_VERSION_MAJOR >= 13
     style.SpacesInAngles = FormatStyle::SIAS_Never;
-#else
-    style.SpacesInAngles = false;
-#endif
     style.SpacesInContainerLiterals = false;
 #if LLVM_VERSION_MAJOR >= 17
     style.SpacesInParens = FormatStyle::SIPO_Never;
@@ -225,9 +194,7 @@ void fromCppCodeStyleSettings(clang::format::FormatStyle &style,
         style.BreakBeforeBraces = FormatStyle::BS_Custom;
 
     style.IndentCaseLabels = settings.indentSwitchLabels;
-#if LLVM_VERSION_MAJOR >= 11
     style.IndentCaseBlocks = settings.indentBlocksRelativeToSwitchLabels;
-#endif
 
     if (settings.extraPaddingForConditionsIfConfusingAlign)
         style.BreakBeforeBinaryOperators = FormatStyle::BOS_All;