diff --git a/.clang-format b/.clang-format
new file mode 100644
index 0000000000..7c5173d051
--- /dev/null
+++ b/.clang-format
@@ -0,0 +1,46 @@
+---
+Language: Cpp
+AccessModifierOffset: -2
+AlignEscapedNewlinesLeft: false
+AlignTrailingComments: true
+AllowAllParametersOfDeclarationOnNextLine: true
+AllowShortFunctionsOnASingleLine: false
+AllowShortIfStatementsOnASingleLine: false
+AllowShortLoopsOnASingleLine: false
+AlwaysBreakBeforeMultilineStrings: true
+AlwaysBreakTemplateDeclarations: true
+BinPackParameters: true
+BreakBeforeBinaryOperators: true
+BreakBeforeBraces: Attach
+BreakBeforeTernaryOperators: true
+BreakConstructorInitializersBeforeComma: true
+ColumnLimit: 90
+ConstructorInitializerAllOnOneLineOrOnePerLine: true
+ConstructorInitializerIndentWidth: 4
+ContinuationIndentWidth: 6
+Cpp11BracedListStyle: true
+DerivePointerBinding: false
+IndentCaseLabels: true
+#Check next
+IndentFunctionDeclarationAfterType: true
+IndentWidth: 2
+MaxEmptyLinesToKeep: 1
+NamespaceIndentation: None
+PenaltyBreakBeforeFirstCallParameter: 19
+PenaltyBreakComment: 300
+PenaltyBreakString: 1000
+PenaltyBreakFirstLessLess: 120
+PenaltyExcessCharacter: 1000000
+PenaltyReturnTypeOnItsOwnLine: 60
+PointerBindsToType: true
+#Check next
+SpaceBeforeAssignmentOperators: true
+SpaceBeforeParens: ControlStatements
+SpaceInEmptyParentheses: false
+SpacesBeforeTrailingComments: 2
+SpacesInAngles: false
+SpacesInCStyleCastParentheses: false
+SpacesInParentheses: false
+Standard: Cpp11
+UseTab: Never
+...
diff --git a/ext/ghoul b/ext/ghoul
index f6a96f6767..aa5f253cbd 160000
--- a/ext/ghoul
+++ b/ext/ghoul
@@ -1 +1 @@
-Subproject commit f6a96f6767ddfecb2f190a78d634abf7009fbdab
+Subproject commit aa5f253cbded2d13f602ca02dd2858a85f0a879e