diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 00000000..e154e2d8
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,86 @@
+name: ci
+
+on:
+  workflow_dispatch:
+  push:
+    branches:
+      - master
+  pull_request:
+    branches:
+      - master
+
+jobs:
+  linux:
+    name: ${{matrix.os}}-${{matrix.otp_version}}-${{matrix.rebar}}
+    runs-on: ${{matrix.os}}
+
+    strategy:
+      fail-fast: false
+      matrix:
+        otp_version: [20,23,26,27]
+        os: [ubuntu-latest]
+        rebar: [rebar, rebar3]
+
+    container:
+      image: erlang:${{matrix.otp_version}}
+
+    steps:
+    - uses: actions/checkout@v4
+    - name: ${{matrix.rebar}} make check
+      run: |
+        make REBAR=${{matrix.rebar}} check
+
+  macos:
+    name: macos
+    runs-on: ${{matrix.os}}
+
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [macos-12, macos-14]
+
+    steps:
+    - uses: actions/checkout@v4
+    - name: install erlang
+      run: |
+        brew install erlang
+    - name: install rebar3
+      run: |
+        brew install rebar3
+    - name: make check
+      run: |
+        make check
+
+  windows:
+    name: windows
+    runs-on: ${{matrix.os}}
+
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [windows-2019, windows-2022]
+
+    steps:
+    - name: prevent git from messing up our json test files
+      run: |
+          git config --global core.autocrlf false
+          git config --global core.eol lf
+    - uses: actions/checkout@v4
+    - name: install erlang
+      run: |
+        choco install erlang
+    - name: install rebar3
+      run: |
+        choco install rebar3
+    - name: make check
+      run: |
+        $path = vswhere -latest -products * -requires Microsoft.VisualStudio.Component.VC.Tools.x86.x64 -nologo -nocolor -property installationPath
+        if ($path) {
+            $path = join-path $path '\VC\Auxiliary\Build\vcvars64.bat'
+            if (test-path $path) {
+                cmd /s /c """$path"" $args && set" | where { $_ -match '(\w+)=(.*)' } | foreach {
+                    $null = new-item -force -path "Env:\$($Matches[1])" -value $Matches[2]
+                }
+            }
+        }
+        make check
diff --git a/.travis.yml b/.travis.yml
deleted file mode 100644
index 53bb22d9..00000000
--- a/.travis.yml
+++ /dev/null
@@ -1,13 +0,0 @@
-language: erlang
-notifications:
-  email: paul.joseph.davis@gmail.com
-script: make check
-otp_release:
-   - 23.0
-   - 22.2.4
-   - 21.3.8.1
-   - 20.3.8.22
-   - 19.3
-   - 18.3
-   - 17.5
-   - R16B03-1
diff --git a/c_src/decoder.c b/c_src/decoder.c
index 8f78117c..27d101a4 100644
--- a/c_src/decoder.c
+++ b/c_src/decoder.c
@@ -621,11 +621,9 @@ dec_number(Decoder* d, ERL_NIF_TERM* value)
 ERL_NIF_TERM
 make_empty_object(ErlNifEnv* env, int ret_map)
 {
-#if MAP_TYPE_PRESENT
     if(ret_map) {
         return enif_make_new_map(env);
     }
-#endif
 
     return enif_make_tuple1(env, enif_make_list(env, 0));
 }
@@ -680,11 +678,7 @@ decode_init(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[])
         } else if(get_bytes_per_red(env, val, &(d->bytes_per_red))) {
             continue;
         } else if(enif_is_identical(val, d->atoms->atom_return_maps)) {
-#if MAP_TYPE_PRESENT
             d->return_maps = 1;
-#else
-            return enif_make_badarg(env);
-#endif
         } else if(enif_is_identical(val, d->atoms->atom_return_trailer)) {
             d->return_trailer = 1;
         } else if(enif_is_identical(val, d->atoms->atom_dedupe_keys)) {
diff --git a/c_src/encoder.c b/c_src/encoder.c
index 4cfb3533..03c5500f 100644
--- a/c_src/encoder.c
+++ b/c_src/encoder.c
@@ -595,7 +595,6 @@ enc_comma(Encoder* e)
     return 1;
 }
 
-#if MAP_TYPE_PRESENT
 int
 enc_map_to_ejson(ErlNifEnv* env, ERL_NIF_TERM map, ERL_NIF_TERM* out)
 {
@@ -636,7 +635,6 @@ enc_map_to_ejson(ErlNifEnv* env, ERL_NIF_TERM map, ERL_NIF_TERM* out)
     *out = enif_make_tuple1(env, list);
     return 1;
 }
-#endif
 
 ERL_NIF_TERM
 encode_init(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[])
@@ -897,7 +895,6 @@ encode_iter(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[])
             termstack_push(&stack, curr);
             termstack_push(&stack, e->atoms->ref_object);
             termstack_push(&stack, tuple[1]);
-#if MAP_TYPE_PRESENT
         } else if(enif_is_map(env, curr)) {
             if(!enc_map_to_ejson(env, curr, &curr)) {
                 ret = enc_error(e, "internal_error");
@@ -905,7 +902,6 @@ encode_iter(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[])
             }
 
             termstack_push(&stack, curr);
-#endif
         } else if(enif_is_list(env, curr)) {
             if(!enc_start_array(e)) {
                 ret = enc_error(e, "internal_error");
diff --git a/c_src/jiffy.h b/c_src/jiffy.h
index 9c97945d..db426116 100644
--- a/c_src/jiffy.h
+++ b/c_src/jiffy.h
@@ -9,10 +9,6 @@
 #define DEFAULT_BYTES_PER_REDUCTION 20
 #define DEFAULT_ERLANG_REDUCTION_COUNT 2000
 
-#define MAP_TYPE_PRESENT \
-    ((ERL_NIF_MAJOR_VERSION == 2 && ERL_NIF_MINOR_VERSION >= 6) \
-    || (ERL_NIF_MAJOR_VERSION > 2))
-
 #define CONSUME_TIMESLICE_PRESENT \
         ((ERL_NIF_MAJOR_VERSION >= 2 && ERL_NIF_MINOR_VERSION >= 4))
 
diff --git a/c_src/objects.cc b/c_src/objects.cc
index 1a16699c..2a35b251 100644
--- a/c_src/objects.cc
+++ b/c_src/objects.cc
@@ -8,10 +8,6 @@
 
 #include "erl_nif.h"
 
-#define MAP_TYPE_PRESENT \
-    ((ERL_NIF_MAJOR_VERSION == 2 && ERL_NIF_MINOR_VERSION >= 6) \
-    || (ERL_NIF_MAJOR_VERSION > 2))
-
 #define BEGIN_C extern "C" {
 #define END_C }
 
@@ -27,8 +23,6 @@ make_object(ErlNifEnv* env, ERL_NIF_TERM pairs, ERL_NIF_TERM* out,
 
     std::set<std::string> seen;
 
-#if MAP_TYPE_PRESENT
-
     ERL_NIF_TERM old_val;
 
     if(ret_map) {
@@ -46,7 +40,6 @@ make_object(ErlNifEnv* env, ERL_NIF_TERM pairs, ERL_NIF_TERM* out,
         *out = ret;
         return 1;
     }
-#endif
 
     ret = enif_make_list(env, 0);
     while(enif_get_list_cell(env, pairs, &val, &pairs)) {
diff --git a/rebar.config b/rebar.config
index 0ee14f41..15e69b61 100644
--- a/rebar.config
+++ b/rebar.config
@@ -21,21 +21,9 @@
     {"(linux|solaris|freebsd|netbsd|openbsd|dragonfly|darwin|gnu)",
         "LDFLAGS", "$LDFLAGS $FLTO_FLAG -lstdc++"},
 
-    %% OS X Leopard flags for 64-bit
-    {"darwin9.*-64$", "CXXFLAGS", "-m64"},
-    {"darwin9.*-64$", "LDFLAGS", "-arch x86_64"},
-
-    %% OS X Snow Leopard flags for 32-bit
-    {"darwin10.*-32$", "CXXFLAGS", "-m32"},
-    {"darwin10.*-32$", "LDFLAGS", "-arch i386"},
-
     {"win32", "CXXFLAGS", "$CXXFLAGS /O2 /DNDEBUG"}
 ]}.
 
-{erl_opts, [
-    {platform_define, "R1(1|2|3|4|5|6)", 'JIFFY_NO_MAPS'}
-]}.
-
 {eunit_opts, [
     verbose
 ]}.
diff --git a/rebar.config.script b/rebar.config.script
index 007e9b3e..c2f1689e 100644
--- a/rebar.config.script
+++ b/rebar.config.script
@@ -53,8 +53,11 @@ case IsRebar2 of
         Config2;
     false ->
         Config2 ++ [
-            {plugins, [{pc, "~> 1.0"}]},
-            {artifacts, ["priv/jiffy.so"]},
+            {plugins, [{pc, "~> 1.15"}]},
+            case os:type() of
+                {win32, _} -> {artifacts, ["priv/jiffy.dll"]};
+                {_, _} -> {artifacts, ["priv/jiffy.so"]}
+            end,
             {provider_hooks, [
                 {post, [
                     {compile, {pc, compile}},
diff --git a/src/jiffy.erl b/src/jiffy.erl
index 6af15b5f..b1f3b98a 100644
--- a/src/jiffy.erl
+++ b/src/jiffy.erl
@@ -22,17 +22,9 @@
 -type json_string() :: atom() | binary().
 -type json_number() :: integer() | float().
 
--ifdef(JIFFY_NO_MAPS).
-
--type json_object() :: {[{json_string(),json_value()}]}.
-
--else.
-
 -type json_object() :: {[{json_string(),json_value()}]}
                         | #{json_string() => json_value()}.
 
--endif.
-
 -type jiffy_decode_result() :: json_value()
                         | {has_trailer, json_value(), binary()}.
 
@@ -141,7 +133,6 @@ finish_decode({has_trailer, Value, Rest}) ->
 finish_decode(Val) ->
     maybe_map(Val).
 
--ifndef(JIFFY_NO_MAPS).
 maybe_map(Obj) when is_map(Obj) ->
     maps:map(fun finish_decode_map/2, Obj);
 maybe_map(Val) ->
@@ -149,10 +140,6 @@ maybe_map(Val) ->
 
 finish_decode_map(_, V) ->
     finish_decode(V).
--else.
-maybe_map(Val) ->
-    Val.
--endif.
 
 finish_decode_obj([], Acc) ->
     {lists:reverse(Acc)};
diff --git a/src/jiffy_utf8.erl b/src/jiffy_utf8.erl
index e79756f9..81346cbb 100644
--- a/src/jiffy_utf8.erl
+++ b/src/jiffy_utf8.erl
@@ -14,7 +14,6 @@ fix(Bin) when is_binary(Bin) ->
 fix(Val) ->
     maybe_map(Val).
 
--ifndef(JIFFY_NO_MAPS).
 maybe_map(Obj) when is_map(Obj) ->
     maps:fold(fun fix_map/3, maps:new(), Obj);
 maybe_map(Val) ->
@@ -22,10 +21,6 @@ maybe_map(Val) ->
 
 fix_map(K, V, Acc) ->
     maps:put(fix(K), fix(V), Acc).
--else.
-maybe_map(Val) ->
-    Val.
--endif.
 
 fix_props([], Acc) ->
     {lists:reverse(Acc)};
diff --git a/test/jiffy_03_number_tests.erl b/test/jiffy_03_number_tests.erl
index ad86a000..7ae8404c 100644
--- a/test/jiffy_03_number_tests.erl
+++ b/test/jiffy_03_number_tests.erl
@@ -36,8 +36,8 @@ gen(error, J) ->
 gen(floats, F) ->
     NegF = -1.0 * F,
     {msg("float round trip - ~p", [F]), [
-        {"Pos", ?_assertEqual(F, dec(enc(F)))},
-        {"Neg", ?_assertEqual(NegF, dec(enc(NegF)))}
+        {"Pos", ?_assert(F == dec(enc(F)))},
+        {"Neg", ?_assert(NegF == dec(enc(NegF)))}
     ]}.
 
 
diff --git a/test/jiffy_11_property_tests.erl b/test/jiffy_11_property_tests.erl
index eb7cf934..b3f05a75 100644
--- a/test/jiffy_11_property_tests.erl
+++ b/test/jiffy_11_property_tests.erl
@@ -21,20 +21,9 @@ property_test_() ->
         run(prop_dec_trailer),
         run(prop_enc_no_crash),
         run(prop_dec_no_crash_bin),
-        run(prop_dec_no_crash_any)
-    ] ++ map_props().
-
-
--ifndef(JIFFY_NO_MAPS).
-map_props() ->
-    [
+        run(prop_dec_no_crash_any),
         run(prop_map_enc_dec)
     ].
--else.
-map_props() ->
-    [].
--endif.
-
 
 prop_enc_dec() ->
     ?FORALL(Data, json(), begin
@@ -63,7 +52,6 @@ prop_enc_dec_pretty() ->
     ).
 
 
--ifndef(JIFFY_NO_MAPS).
 prop_map_enc_dec() ->
     ?FORALL(Data, json(),
         begin
@@ -71,7 +59,6 @@ prop_map_enc_dec() ->
             MapData == jiffy:decode(jiffy:encode(MapData), [return_maps])
         end
     ).
--endif.
 
 
 prop_enc_no_crash() ->
@@ -115,7 +102,6 @@ run(Name) ->
     ]}.
 
 
--ifndef(JIFFY_NO_MAPS).
 to_map_ejson({Props}) ->
     NewProps = [{K, to_map_ejson(V)} || {K, V} <- Props],
     maps:from_list(NewProps);
@@ -123,7 +109,6 @@ to_map_ejson(Vals) when is_list(Vals) ->
     [to_map_ejson(V) || V <- Vals];
 to_map_ejson(Val) ->
     Val.
--endif.
 
 
 % Random any term generation
diff --git a/test/jiffy_15_return_trailer_tests.erl b/test/jiffy_15_return_trailer_tests.erl
index 80937fa1..c8860c85 100644
--- a/test/jiffy_15_return_trailer_tests.erl
+++ b/test/jiffy_15_return_trailer_tests.erl
@@ -18,13 +18,9 @@ trailer_test_() ->
         ?_assertEqual(Result, jiffy:decode(Data, Opts))
     end, Cases)}.
 
--ifndef(JIFFY_NO_MAPS).
-
 trailer_bignum_test() ->
     Opts = [return_maps, return_trailer],
     Data = <<"{\"amount\":-50000000000000000000}{}">>,
     Obj = #{<<"amount">> => -50000000000000000000},
     Expect = {has_trailer, Obj, <<"{}">>},
     ?assertEqual(Expect, jiffy:decode(Data, Opts)).
-
--endif.
diff --git a/test/jiffy_17_copy_strings_tests.erl b/test/jiffy_17_copy_strings_tests.erl
index 359b9971..5401c86d 100644
--- a/test/jiffy_17_copy_strings_tests.erl
+++ b/test/jiffy_17_copy_strings_tests.erl
@@ -24,10 +24,10 @@ check_binaries(_Bin) ->
 copy_strings_test_() ->
     Opts = [copy_strings],
     Cases = [
-        <<"\"foo\"">>,
-        <<"[\"bar\"]">>,
-        <<"{\"foo\":\"bar\"}">>,
-        <<"{\"foo\":[\"bar\"]}">>
+        <<"\"xoooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooo\"">>,
+        <<"[\"yoooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooo\"]">>,
+        <<"{\"zoooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooo\":\"woooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooo\"}">>,
+        <<"{\"koooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooo\":[\"loooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooo\"]}">>
     ],
     {"Test copy_strings", lists:map(fun(Json) ->
         EJson = jiffy:decode(Json, Opts),