diff --git a/spec/compiler/build_tables/build_tables_spec.cpp b/spec/compiler/build_tables/build_tables_spec.cc
similarity index 100%
rename from spec/compiler/build_tables/build_tables_spec.cpp
rename to spec/compiler/build_tables/build_tables_spec.cc
diff --git a/spec/compiler/build_tables/first_set_spec.cpp b/spec/compiler/build_tables/first_set_spec.cc
similarity index 100%
rename from spec/compiler/build_tables/first_set_spec.cpp
rename to spec/compiler/build_tables/first_set_spec.cc
diff --git a/spec/compiler/build_tables/follow_sets_spec.cpp b/spec/compiler/build_tables/follow_sets_spec.cc
similarity index 100%
rename from spec/compiler/build_tables/follow_sets_spec.cpp
rename to spec/compiler/build_tables/follow_sets_spec.cc
diff --git a/spec/compiler/build_tables/item_set_closure_spec.cpp b/spec/compiler/build_tables/item_set_closure_spec.cc
similarity index 100%
rename from spec/compiler/build_tables/item_set_closure_spec.cpp
rename to spec/compiler/build_tables/item_set_closure_spec.cc
diff --git a/spec/compiler/build_tables/rule_can_be_blank_spec.cpp b/spec/compiler/build_tables/rule_can_be_blank_spec.cc
similarity index 100%
rename from spec/compiler/build_tables/rule_can_be_blank_spec.cpp
rename to spec/compiler/build_tables/rule_can_be_blank_spec.cc
diff --git a/spec/compiler/build_tables/rule_transitions_spec.cpp b/spec/compiler/build_tables/rule_transitions_spec.cc
similarity index 100%
rename from spec/compiler/build_tables/rule_transitions_spec.cpp
rename to spec/compiler/build_tables/rule_transitions_spec.cc
diff --git a/spec/compiler/compile_examples.cpp b/spec/compiler/compile_examples.cc
similarity index 100%
rename from spec/compiler/compile_examples.cpp
rename to spec/compiler/compile_examples.cc
diff --git a/spec/compiler/compiler_specs.cpp b/spec/compiler/compiler_specs.cc
similarity index 100%
rename from spec/compiler/compiler_specs.cpp
rename to spec/compiler/compiler_specs.cc
diff --git a/spec/compiler/helpers/character_set_helpers.cpp b/spec/compiler/helpers/character_set_helpers.cc
similarity index 100%
rename from spec/compiler/helpers/character_set_helpers.cpp
rename to spec/compiler/helpers/character_set_helpers.cc
diff --git a/spec/compiler/prepare_grammar_spec.cpp b/spec/compiler/prepare_grammar_spec.cc
similarity index 100%
rename from spec/compiler/prepare_grammar_spec.cpp
rename to spec/compiler/prepare_grammar_spec.cc
diff --git a/spec/compiler/rules/character_set_spec.cpp b/spec/compiler/rules/character_set_spec.cc
similarity index 100%
rename from spec/compiler/rules/character_set_spec.cpp
rename to spec/compiler/rules/character_set_spec.cc
diff --git a/spec/compiler/rules/pattern_spec.cpp b/spec/compiler/rules/pattern_spec.cc
similarity index 100%
rename from spec/compiler/rules/pattern_spec.cpp
rename to spec/compiler/rules/pattern_spec.cc
diff --git a/spec/compiler/rules/rules_spec.cpp b/spec/compiler/rules/rules_spec.cc
similarity index 100%
rename from spec/compiler/rules/rules_spec.cpp
rename to spec/compiler/rules/rules_spec.cc
diff --git a/spec/runtime/arithmetic_spec.cpp b/spec/runtime/arithmetic_spec.cc
similarity index 100%
rename from spec/runtime/arithmetic_spec.cpp
rename to spec/runtime/arithmetic_spec.cc
diff --git a/spec/runtime/json_spec.cpp b/spec/runtime/json_spec.cc
similarity index 100%
rename from spec/runtime/json_spec.cpp
rename to spec/runtime/json_spec.cc
diff --git a/spec/runtime/runtime_specs.cpp b/spec/runtime/runtime_specs.cc
similarity index 100%
rename from spec/runtime/runtime_specs.cpp
rename to spec/runtime/runtime_specs.cc
diff --git a/spec/runtime/tree_spec.cpp b/spec/runtime/tree_spec.cc
similarity index 100%
rename from spec/runtime/tree_spec.cpp
rename to spec/runtime/tree_spec.cc
diff --git a/src/compiler/build_tables/build_tables.cpp b/src/compiler/build_tables/build_tables.cc
similarity index 100%
rename from src/compiler/build_tables/build_tables.cpp
rename to src/compiler/build_tables/build_tables.cc
diff --git a/src/compiler/build_tables/first_set.cpp b/src/compiler/build_tables/first_set.cc
similarity index 100%
rename from src/compiler/build_tables/first_set.cpp
rename to src/compiler/build_tables/first_set.cc
diff --git a/src/compiler/build_tables/follow_sets.cpp b/src/compiler/build_tables/follow_sets.cc
similarity index 100%
rename from src/compiler/build_tables/follow_sets.cpp
rename to src/compiler/build_tables/follow_sets.cc
diff --git a/src/compiler/build_tables/item.cpp b/src/compiler/build_tables/item.cc
similarity index 100%
rename from src/compiler/build_tables/item.cpp
rename to src/compiler/build_tables/item.cc
diff --git a/src/compiler/build_tables/item_set_closure.cpp b/src/compiler/build_tables/item_set_closure.cc
similarity index 100%
rename from src/compiler/build_tables/item_set_closure.cpp
rename to src/compiler/build_tables/item_set_closure.cc
diff --git a/src/compiler/build_tables/item_set_transitions.cpp b/src/compiler/build_tables/item_set_transitions.cc
similarity index 100%
rename from src/compiler/build_tables/item_set_transitions.cpp
rename to src/compiler/build_tables/item_set_transitions.cc
diff --git a/src/compiler/build_tables/rule_can_be_blank.cpp b/src/compiler/build_tables/rule_can_be_blank.cc
similarity index 100%
rename from src/compiler/build_tables/rule_can_be_blank.cpp
rename to src/compiler/build_tables/rule_can_be_blank.cc
diff --git a/src/compiler/build_tables/rule_transitions.cpp b/src/compiler/build_tables/rule_transitions.cc
similarity index 100%
rename from src/compiler/build_tables/rule_transitions.cpp
rename to src/compiler/build_tables/rule_transitions.cc
diff --git a/src/compiler/compile.cpp b/src/compiler/compile.cc
similarity index 100%
rename from src/compiler/compile.cpp
rename to src/compiler/compile.cc
diff --git a/src/compiler/generate_code/c_code.cpp b/src/compiler/generate_code/c_code.cc
similarity index 100%
rename from src/compiler/generate_code/c_code.cpp
rename to src/compiler/generate_code/c_code.cc
diff --git a/src/compiler/generate_code/helpers.cpp b/src/compiler/generate_code/helpers.cc
similarity index 100%
rename from src/compiler/generate_code/helpers.cpp
rename to src/compiler/generate_code/helpers.cc
diff --git a/src/compiler/grammar.cpp b/src/compiler/grammar.cc
similarity index 100%
rename from src/compiler/grammar.cpp
rename to src/compiler/grammar.cc
diff --git a/src/compiler/lex_table.cpp b/src/compiler/lex_table.cc
similarity index 100%
rename from src/compiler/lex_table.cpp
rename to src/compiler/lex_table.cc
diff --git a/src/compiler/parse_table.cpp b/src/compiler/parse_table.cc
similarity index 100%
rename from src/compiler/parse_table.cpp
rename to src/compiler/parse_table.cc
diff --git a/src/compiler/prepare_grammar/expand_repeats.cpp b/src/compiler/prepare_grammar/expand_repeats.cc
similarity index 100%
rename from src/compiler/prepare_grammar/expand_repeats.cpp
rename to src/compiler/prepare_grammar/expand_repeats.cc
diff --git a/src/compiler/prepare_grammar/extract_tokens.cpp b/src/compiler/prepare_grammar/extract_tokens.cc
similarity index 100%
rename from src/compiler/prepare_grammar/extract_tokens.cpp
rename to src/compiler/prepare_grammar/extract_tokens.cc
diff --git a/src/compiler/prepare_grammar/prepare_grammar.cpp b/src/compiler/prepare_grammar/prepare_grammar.cc
similarity index 100%
rename from src/compiler/prepare_grammar/prepare_grammar.cpp
rename to src/compiler/prepare_grammar/prepare_grammar.cc
diff --git a/src/compiler/prepared_grammar.cpp b/src/compiler/prepared_grammar.cc
similarity index 100%
rename from src/compiler/prepared_grammar.cpp
rename to src/compiler/prepared_grammar.cc
diff --git a/src/compiler/rules/blank.cpp b/src/compiler/rules/blank.cc
similarity index 100%
rename from src/compiler/rules/blank.cpp
rename to src/compiler/rules/blank.cc
diff --git a/src/compiler/rules/built_in_symbols.cpp b/src/compiler/rules/built_in_symbols.cc
similarity index 100%
rename from src/compiler/rules/built_in_symbols.cpp
rename to src/compiler/rules/built_in_symbols.cc
diff --git a/src/compiler/rules/character_range.cpp b/src/compiler/rules/character_range.cc
similarity index 100%
rename from src/compiler/rules/character_range.cpp
rename to src/compiler/rules/character_range.cc
diff --git a/src/compiler/rules/character_set.cpp b/src/compiler/rules/character_set.cc
similarity index 100%
rename from src/compiler/rules/character_set.cpp
rename to src/compiler/rules/character_set.cc
diff --git a/src/compiler/rules/choice.cpp b/src/compiler/rules/choice.cc
similarity index 100%
rename from src/compiler/rules/choice.cpp
rename to src/compiler/rules/choice.cc
diff --git a/src/compiler/rules/pattern.cpp b/src/compiler/rules/pattern.cc
similarity index 100%
rename from src/compiler/rules/pattern.cpp
rename to src/compiler/rules/pattern.cc
diff --git a/src/compiler/rules/repeat.cpp b/src/compiler/rules/repeat.cc
similarity index 100%
rename from src/compiler/rules/repeat.cpp
rename to src/compiler/rules/repeat.cc
diff --git a/src/compiler/rules/rule.cpp b/src/compiler/rules/rule.cc
similarity index 100%
rename from src/compiler/rules/rule.cpp
rename to src/compiler/rules/rule.cc
diff --git a/src/compiler/rules/rules.cpp b/src/compiler/rules/rules.cc
similarity index 100%
rename from src/compiler/rules/rules.cpp
rename to src/compiler/rules/rules.cc
diff --git a/src/compiler/rules/seq.cpp b/src/compiler/rules/seq.cc
similarity index 100%
rename from src/compiler/rules/seq.cpp
rename to src/compiler/rules/seq.cc
diff --git a/src/compiler/rules/string.cpp b/src/compiler/rules/string.cc
similarity index 100%
rename from src/compiler/rules/string.cpp
rename to src/compiler/rules/string.cc
diff --git a/src/compiler/rules/symbol.cpp b/src/compiler/rules/symbol.cc
similarity index 100%
rename from src/compiler/rules/symbol.cpp
rename to src/compiler/rules/symbol.cc
diff --git a/src/compiler/rules/visitor.cpp b/src/compiler/rules/visitor.cc
similarity index 100%
rename from src/compiler/rules/visitor.cpp
rename to src/compiler/rules/visitor.cc
diff --git a/tree_sitter.gyp b/tree_sitter.gyp
index 776b3b13..67d40574 100644
--- a/tree_sitter.gyp
+++ b/tree_sitter.gyp
@@ -9,7 +9,7 @@
         'src',
       ],
       'sources': [
-        '<!@(find include src -name "*.h" -or -name "*.cpp" -or -name "*.c")',
+        '<!@(find include src -name "*.h" -or -name "*.cc" -or -name "*.c")',
       ],
       'xcode_settings': {
         'GCC_ENABLE_CPP_RTTI': 'YES',
@@ -49,7 +49,7 @@
         'spec/compiler',
       ],
       'sources': [
-        '<!@(find spec/compiler -name "*.h" -or -name "*.cpp")',
+        '<!@(find spec/compiler -name "*.h" -or -name "*.cc")',
         '<!@(find examples/grammars -name "*.hpp")',
       ],
     },
@@ -65,7 +65,7 @@
         'spec/runtime',
       ],
       'sources': [
-        '<!@(find spec/runtime -name "*.h" -or -name "*.cpp")',
+        '<!@(find spec/runtime -name "*.h" -or -name "*.cc")',
         '<!@(find examples/parsers -name "*.c")',
       ],
     },