diff --git a/libpng-1.6.36-apng.patch b/libpng-1.6.37-apng.patch
similarity index 95%
rename from libpng-1.6.36-apng.patch
rename to libpng-1.6.37-apng.patch
index 656e9a0..8aaa50b 100644
--- a/libpng-1.6.36-apng.patch
+++ b/libpng-1.6.37-apng.patch
@@ -1,6 +1,6 @@
-diff -Naru libpng-1.6.36.org/png.h libpng-1.6.36/png.h
---- libpng-1.6.36.org/png.h	2018-12-02 22:43:57.309906480 +0900
-+++ libpng-1.6.36/png.h	2018-12-02 22:43:57.355905745 +0900
+diff -Naru libpng-1.6.37.org/png.h libpng-1.6.37/png.h
+--- libpng-1.6.37.org/png.h	2019-04-19 07:21:37.398024800 +0900
++++ libpng-1.6.37/png.h	2019-04-19 07:22:37.871245630 +0900
 @@ -330,6 +330,10 @@
  #   include "pnglibconf.h"
  #endif
@@ -139,9 +139,9 @@ diff -Naru libpng-1.6.36.org/png.h libpng-1.6.36/png.h
  #endif
  
  #ifdef __cplusplus
-diff -Naru libpng-1.6.36.org/pngget.c libpng-1.6.36/pngget.c
---- libpng-1.6.36.org/pngget.c	2018-12-02 22:43:57.309906480 +0900
-+++ libpng-1.6.36/pngget.c	2018-12-02 22:43:57.355905745 +0900
+diff -Naru libpng-1.6.37.org/pngget.c libpng-1.6.37/pngget.c
+--- libpng-1.6.37.org/pngget.c	2019-04-19 07:21:37.399024787 +0900
++++ libpng-1.6.37/pngget.c	2019-04-19 07:22:37.850245901 +0900
 @@ -1246,4 +1246,166 @@
  #  endif
  #endif
@@ -309,9 +309,9 @@ diff -Naru libpng-1.6.36.org/pngget.c libpng-1.6.36/pngget.c
 +}
 +#endif /* PNG_APNG_SUPPORTED */
  #endif /* READ || WRITE */
-diff -Naru libpng-1.6.36.org/pnginfo.h libpng-1.6.36/pnginfo.h
---- libpng-1.6.36.org/pnginfo.h	2018-12-02 22:43:57.309906480 +0900
-+++ libpng-1.6.36/pnginfo.h	2018-12-02 22:43:57.355905745 +0900
+diff -Naru libpng-1.6.37.org/pnginfo.h libpng-1.6.37/pnginfo.h
+--- libpng-1.6.37.org/pnginfo.h	2019-04-19 07:21:37.399024787 +0900
++++ libpng-1.6.37/pnginfo.h	2019-04-19 07:22:37.850245901 +0900
 @@ -263,5 +263,18 @@
     png_bytepp row_pointers;        /* the image bits */
  #endif
@@ -331,9 +331,9 @@ diff -Naru libpng-1.6.36.org/pnginfo.h libpng-1.6.36/pnginfo.h
 +
  };
  #endif /* PNGINFO_H */
-diff -Naru libpng-1.6.36.org/pngpread.c libpng-1.6.36/pngpread.c
---- libpng-1.6.36.org/pngpread.c	2018-12-02 22:43:57.309906480 +0900
-+++ libpng-1.6.36/pngpread.c	2018-12-02 22:43:57.356905729 +0900
+diff -Naru libpng-1.6.37.org/pngpread.c libpng-1.6.37/pngpread.c
+--- libpng-1.6.37.org/pngpread.c	2019-04-19 07:21:37.399024787 +0900
++++ libpng-1.6.37/pngpread.c	2019-04-19 07:22:37.850245901 +0900
 @@ -195,6 +195,106 @@
  
     chunk_name = png_ptr->chunk_name;
@@ -594,9 +594,9 @@ diff -Naru libpng-1.6.36.org/pngpread.c libpng-1.6.36/pngpread.c
  png_voidp PNGAPI
  png_get_progressive_ptr(png_const_structrp png_ptr)
  {
-diff -Naru libpng-1.6.36.org/pngpriv.h libpng-1.6.36/pngpriv.h
---- libpng-1.6.36.org/pngpriv.h	2018-12-02 22:43:57.310906464 +0900
-+++ libpng-1.6.36/pngpriv.h	2018-12-02 22:43:57.356905729 +0900
+diff -Naru libpng-1.6.37.org/pngpriv.h libpng-1.6.37/pngpriv.h
+--- libpng-1.6.37.org/pngpriv.h	2019-04-19 07:21:37.399024787 +0900
++++ libpng-1.6.37/pngpriv.h	2019-04-19 07:22:37.850245901 +0900
 @@ -637,6 +637,10 @@
  #define PNG_HAVE_CHUNK_AFTER_IDAT 0x2000U /* Have another chunk after IDAT */
                     /*             0x4000U (unused) */
@@ -673,9 +673,9 @@ diff -Naru libpng-1.6.36.org/pngpriv.h libpng-1.6.36/pngpriv.h
  /* Added at libpng version 1.4.0 */
  #ifdef PNG_COLORSPACE_SUPPORTED
  /* These internal functions are for maintaining the colorspace structure within
-diff -Naru libpng-1.6.36.org/pngread.c libpng-1.6.36/pngread.c
---- libpng-1.6.36.org/pngread.c	2018-12-02 22:43:57.310906464 +0900
-+++ libpng-1.6.36/pngread.c	2018-12-02 22:43:57.356905729 +0900
+diff -Naru libpng-1.6.37.org/pngread.c libpng-1.6.37/pngread.c
+--- libpng-1.6.37.org/pngread.c	2019-04-19 07:21:37.400024774 +0900
++++ libpng-1.6.37/pngread.c	2019-04-19 07:22:37.851245887 +0900
 @@ -161,6 +161,9 @@
  
        else if (chunk_name == png_IDAT)
@@ -777,9 +777,9 @@ diff -Naru libpng-1.6.36.org/pngread.c libpng-1.6.36/pngread.c
  /* Optional call to update the users info_ptr structure */
  void PNGAPI
  png_read_update_info(png_structrp png_ptr, png_inforp info_ptr)
-diff -Naru libpng-1.6.36.org/pngrutil.c libpng-1.6.36/pngrutil.c
---- libpng-1.6.36.org/pngrutil.c	2018-12-02 22:43:57.311906448 +0900
-+++ libpng-1.6.36/pngrutil.c	2018-12-02 22:43:57.358905697 +0900
+diff -Naru libpng-1.6.37.org/pngrutil.c libpng-1.6.37/pngrutil.c
+--- libpng-1.6.37.org/pngrutil.c	2019-04-19 07:21:37.401024761 +0900
++++ libpng-1.6.37/pngrutil.c	2019-04-19 07:22:37.853245862 +0900
 @@ -865,6 +865,11 @@
     filter_type = buf[11];
     interlace_type = buf[12];
@@ -1111,9 +1111,9 @@ diff -Naru libpng-1.6.36.org/pngrutil.c libpng-1.6.36/pngrutil.c
 +#endif /* PNG_PROGRESSIVE_READ_SUPPORTED */
 +#endif /* PNG_READ_APNG_SUPPORTED */
  #endif /* READ */
-diff -Naru libpng-1.6.36.org/pngset.c libpng-1.6.36/pngset.c
---- libpng-1.6.36.org/pngset.c	2018-12-02 22:43:57.312906432 +0900
-+++ libpng-1.6.36/pngset.c	2018-12-02 22:43:57.358905697 +0900
+diff -Naru libpng-1.6.37.org/pngset.c libpng-1.6.37/pngset.c
+--- libpng-1.6.37.org/pngset.c	2019-04-19 07:21:37.401024761 +0900
++++ libpng-1.6.37/pngset.c	2019-04-19 07:22:37.858245798 +0900
 @@ -288,6 +288,11 @@
     info_ptr->pixel_depth = (png_byte)(info_ptr->channels * info_ptr->bit_depth);
  
@@ -1274,10 +1274,10 @@ diff -Naru libpng-1.6.36.org/pngset.c libpng-1.6.36/pngset.c
  #ifdef PNG_STORE_UNKNOWN_CHUNKS_SUPPORTED
  static png_byte
  check_location(png_const_structrp png_ptr, int location)
-diff -Naru libpng-1.6.36.org/pngstruct.h libpng-1.6.36/pngstruct.h
---- libpng-1.6.36.org/pngstruct.h	2018-12-02 22:43:57.312906432 +0900
-+++ libpng-1.6.36/pngstruct.h	2018-12-02 22:43:57.358905697 +0900
-@@ -407,6 +407,27 @@
+diff -Naru libpng-1.6.37.org/pngstruct.h libpng-1.6.37/pngstruct.h
+--- libpng-1.6.37.org/pngstruct.h	2019-04-19 07:21:37.401024761 +0900
++++ libpng-1.6.37/pngstruct.h	2019-04-19 07:22:37.854245849 +0900
+@@ -409,6 +409,27 @@
     png_byte filter_type;
  #endif
  
@@ -1305,9 +1305,9 @@ diff -Naru libpng-1.6.36.org/pngstruct.h libpng-1.6.36/pngstruct.h
  /* New members added in libpng-1.2.0 */
  
  /* New members added in libpng-1.0.2 but first enabled by default in 1.2.0 */
-diff -Naru libpng-1.6.36.org/pngtest.c libpng-1.6.36/pngtest.c
---- libpng-1.6.36.org/pngtest.c	2018-12-02 22:43:57.312906432 +0900
-+++ libpng-1.6.36/pngtest.c	2018-12-02 22:43:57.358905697 +0900
+diff -Naru libpng-1.6.37.org/pngtest.c libpng-1.6.37/pngtest.c
+--- libpng-1.6.37.org/pngtest.c	2019-04-19 07:21:37.401024761 +0900
++++ libpng-1.6.37/pngtest.c	2019-04-19 07:22:37.854245849 +0900
 @@ -875,6 +875,10 @@
     volatile int num_passes;
     int pass;
@@ -1319,7 +1319,7 @@ diff -Naru libpng-1.6.36.org/pngtest.c libpng-1.6.36/pngtest.c
  
     row_buf = NULL;
     error_parameters.file_name = inname;
-@@ -1381,6 +1385,22 @@
+@@ -1383,6 +1387,22 @@
        }
     }
  #endif
@@ -1342,7 +1342,7 @@ diff -Naru libpng-1.6.36.org/pngtest.c libpng-1.6.36/pngtest.c
  #ifdef PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED
     {
        png_unknown_chunkp unknowns;
-@@ -1461,6 +1481,110 @@
+@@ -1463,6 +1483,110 @@
     t_misc += (t_stop - t_start);
     t_start = t_stop;
  #endif
@@ -1453,9 +1453,9 @@ diff -Naru libpng-1.6.36.org/pngtest.c libpng-1.6.36/pngtest.c
     for (pass = 0; pass < num_passes; pass++)
     {
  #     ifdef calc_pass_height
-diff -Naru libpng-1.6.36.org/pngwrite.c libpng-1.6.36/pngwrite.c
---- libpng-1.6.36.org/pngwrite.c	2018-12-02 22:43:57.313906416 +0900
-+++ libpng-1.6.36/pngwrite.c	2018-12-02 22:43:57.359905681 +0900
+diff -Naru libpng-1.6.37.org/pngwrite.c libpng-1.6.37/pngwrite.c
+--- libpng-1.6.37.org/pngwrite.c	2019-04-19 07:21:37.402024748 +0900
++++ libpng-1.6.37/pngwrite.c	2019-04-19 07:22:37.855245836 +0900
 @@ -128,6 +128,10 @@
         * the application continues writing the PNG.  So check the 'invalid'
         * flag here too.
@@ -1479,7 +1479,7 @@ diff -Naru libpng-1.6.36.org/pngwrite.c libpng-1.6.36/pngwrite.c
     /* See if user wants us to write information chunks */
     if (info_ptr != NULL)
     {
-@@ -1465,6 +1474,43 @@
+@@ -1461,6 +1470,43 @@
  }
  #endif
  
@@ -1523,9 +1523,9 @@ diff -Naru libpng-1.6.36.org/pngwrite.c libpng-1.6.36/pngwrite.c
  
  #ifdef PNG_SIMPLIFIED_WRITE_SUPPORTED
  /* Initialize the write structure - general purpose utility. */
-diff -Naru libpng-1.6.36.org/pngwutil.c libpng-1.6.36/pngwutil.c
---- libpng-1.6.36.org/pngwutil.c	2018-12-02 22:43:57.313906416 +0900
-+++ libpng-1.6.36/pngwutil.c	2018-12-02 22:43:57.359905681 +0900
+diff -Naru libpng-1.6.37.org/pngwutil.c libpng-1.6.37/pngwutil.c
+--- libpng-1.6.37.org/pngwutil.c	2019-04-19 07:21:37.402024748 +0900
++++ libpng-1.6.37/pngwutil.c	2019-04-19 07:22:37.867245682 +0900
 @@ -821,6 +821,11 @@
     /* Write the chunk */
     png_write_complete_chunk(png_ptr, png_IHDR, buf, 13);
@@ -1699,9 +1699,9 @@ diff -Naru libpng-1.6.36.org/pngwutil.c libpng-1.6.36/pngwutil.c
 +}
 +#endif /* PNG_WRITE_APNG_SUPPORTED */
  #endif /* WRITE */
-diff -Naru libpng-1.6.36.org/scripts/symbols.def libpng-1.6.36/scripts/symbols.def
---- libpng-1.6.36.org/scripts/symbols.def	2018-12-02 22:43:57.315906384 +0900
-+++ libpng-1.6.36/scripts/symbols.def	2018-12-02 22:43:57.362905633 +0900
+diff -Naru libpng-1.6.37.org/scripts/symbols.def libpng-1.6.37/scripts/symbols.def
+--- libpng-1.6.37.org/scripts/symbols.def	2019-04-19 07:21:37.405024710 +0900
++++ libpng-1.6.37/scripts/symbols.def	2019-04-19 07:22:37.856245823 +0900
 @@ -253,3 +253,23 @@
   png_set_eXIf @247
   png_get_eXIf_1 @248
diff --git a/libpng.spec b/libpng.spec
index 5c0a1f5..a605b1e 100644
--- a/libpng.spec
+++ b/libpng.spec
@@ -1,6 +1,6 @@
 %define apiver %(echo %version | cut -d. -f1-2 | tr -d .)
 Name:          libpng
-Version:       1.6.36
+Version:       1.6.37
 Release:       1mamba
 Summary:       A library of functions for manipulating PNG image format files
 Group:         System/Libraries
@@ -126,6 +126,9 @@ ln -s libpng%{apiver}.so %{buildroot}%{_prefix}/lib/libpng.so
 %endif
 
 %changelog
+* Fri Apr 19 2019 Automatic Build System <autodist@mambasoft.it> 1.6.37-1mamba
+- automatic version update by autodist
+
 * Tue Dec 25 2018 Automatic Build System <autodist@mambasoft.it> 1.6.36-1mamba
 - automatic version update by autodist