diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 498e6b5..d195875 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -16,6 +16,7 @@ jobs:
       fail-fast: false
       matrix:
         name: [
+          ubuntu-18.04-gcc-4.8,
           ubuntu-18.04-gcc-5,
           ubuntu-18.04-gcc-6,
           ubuntu-18.04-gcc-7,
@@ -45,6 +46,11 @@ jobs:
         ]
 
         include:
+          - name: ubuntu-18.04-gcc-4.8
+            os: ubuntu-18.04
+            compiler: gcc
+            version: "4.8"
+
           - name: ubuntu-18.04-gcc-5
             os: ubuntu-18.04
             compiler: gcc
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 87b68b4..8769b83 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,7 +1,7 @@
 cmake_minimum_required(VERSION 3.5)
 
 
-project(inja LANGUAGES CXX VERSION 2.3.0)
+project(inja LANGUAGES CXX VERSION 3.0.0)
 
 
 option(INJA_USE_EMBEDDED_JSON "Use the shipped json header if not available on the system" ON)
diff --git a/README.md b/README.md
index 906f3c3..e199a70 100644
--- a/README.md
+++ b/README.md
@@ -312,7 +312,7 @@ render("Hello{# Todo #}!", data); // "Hello!"
 
 Inja uses `string_view` from C++17, but includes the [polyfill](https://github.com/martinmoene/string-view-lite) from martinmoene. This way, the minimum version is C++11. Currently, the following compilers are tested:
 
-- GCC 5.0 - 9 (and possibly later)
+- GCC 4.8 - 9 (and possibly later)
 - Clang 3.5 - 9 (and possibly later)
 - Microsoft Visual C++ 2016 - 2019 (and possibly later)
 
diff --git a/doc/Doxyfile b/doc/Doxyfile
index eecdfdd..04b326e 100644
--- a/doc/Doxyfile
+++ b/doc/Doxyfile
@@ -38,7 +38,7 @@ PROJECT_NAME           = "Inja"
 # could be handy for archiving the generated documentation or if some version
 # control system is used.
 
-PROJECT_NUMBER         = 2.2.0
+PROJECT_NUMBER         = 3.0.0
 
 # Using the PROJECT_BRIEF tag one can provide an optional one line description
 # for a project that appears at the top of each page and should give viewer a