diff --git a/README.md b/README.md
index 6e345eba5..d016f269d 100644
--- a/README.md
+++ b/README.md
@@ -705,7 +705,7 @@ json j_from_msgpack = json::from_msgpack(v_msgpack);
 
 Though it's 2016 already, the support for C++11 is still a bit sparse. Currently, the following compilers are known to work:
 
-- GCC 4.9 - 6.0 (and possibly later)
+- GCC 4.8.5 - 6.0 (and possibly later)
 - Clang 3.4 - 3.9 (and possibly later)
 - Microsoft Visual C++ 2015 / Build Tools 14.0.25123.0 (and possibly later)
 - Microsoft Visual C++ 2017 / Build Tools 15.1.548.43366 (and possibly later)
diff --git a/src/json.hpp b/src/json.hpp
index 8a8b876a7..bebb35753 100644
--- a/src/json.hpp
+++ b/src/json.hpp
@@ -61,7 +61,7 @@ SOFTWARE.
         #error "unsupported Clang version - see https://github.com/nlohmann/json#supported-compilers"
     #endif
 #elif defined(__GNUC__)
-    #if (__GNUC__ * 10000 + __GNUC_MINOR__ * 100 + __GNUC_PATCHLEVEL__) < 40900
+    #if (__GNUC__ * 10000 + __GNUC_MINOR__ * 100 + __GNUC_PATCHLEVEL__) < 40805
         #error "unsupported GCC version - see https://github.com/nlohmann/json#supported-compilers"
     #endif
 #endif
diff --git a/src/json.hpp.re2c b/src/json.hpp.re2c
index 5dc86d1e2..a99f36112 100644
--- a/src/json.hpp.re2c
+++ b/src/json.hpp.re2c
@@ -61,7 +61,7 @@ SOFTWARE.
         #error "unsupported Clang version - see https://github.com/nlohmann/json#supported-compilers"
     #endif
 #elif defined(__GNUC__)
-    #if (__GNUC__ * 10000 + __GNUC_MINOR__ * 100 + __GNUC_PATCHLEVEL__) < 40900
+    #if (__GNUC__ * 10000 + __GNUC_MINOR__ * 100 + __GNUC_PATCHLEVEL__) < 40805
         #error "unsupported GCC version - see https://github.com/nlohmann/json#supported-compilers"
     #endif
 #endif