diff --git a/cores/esp8266/TZ.h b/cores/esp8266/TZ.h
index 22d45fbb3..ea53c363a 100644
--- a/cores/esp8266/TZ.h
+++ b/cores/esp8266/TZ.h
@@ -1,7 +1,7 @@
 
 // autogenerated from https://raw.githubusercontent.com/nayarsystems/posix_tz_db/master/zones.csv
 // by script <esp8266 arduino core>/tools/TZupdate.sh
-// Sat Jun 26 17:17:30 UTC 2021
+// Mon Jul 26 20:04:37 UTC 2021
 //
 // This database is autogenerated from IANA timezone database
 //    https://raw.githubusercontent.com/nayarsystems/posix_tz_db/master/zones.csv
diff --git a/cores/esp8266/pgmspace.h b/cores/esp8266/pgmspace.h
index af1a211a3..23506a095 100644
--- a/cores/esp8266/pgmspace.h
+++ b/cores/esp8266/pgmspace.h
@@ -3,6 +3,7 @@
 // This file's contents have been moved to newlib.  This file simply
 // includes the newlib pgmspace file as well as some ets headers
 // to preserve backwards compatibility
+// current source: https://github.com/earlephilhower/newlib-xtensa/blob/xtensa-4_0_0-lock-arduino/newlib/libc/sys/xtensa/sys/pgmspace.h
 
 #include <sys/pgmspace.h>
 
diff --git a/libraries/ESP8266WiFi/examples/BearSSL_Sessions/certs.h b/libraries/ESP8266WiFi/examples/BearSSL_Sessions/certs.h
index c35a6d0db..04765d956 100644
--- a/libraries/ESP8266WiFi/examples/BearSSL_Sessions/certs.h
+++ b/libraries/ESP8266WiFi/examples/BearSSL_Sessions/certs.h
@@ -1,7 +1,7 @@
 
 // this file is autogenerated - any modification will be overwritten
 // unused symbols will not be linked in the final binary
-// generated on 2021-07-16 02:12:55
+// generated on 2021-07-26 22:04:48
 // by ['../../../../tools/cert.py', '-s', 'api.github.com', '-n', 'github']
 
 #pragma once
diff --git a/libraries/ESP8266WiFi/examples/BearSSL_Validation/certs.h b/libraries/ESP8266WiFi/examples/BearSSL_Validation/certs.h
index 994aec713..cf6c1ca76 100644
--- a/libraries/ESP8266WiFi/examples/BearSSL_Validation/certs.h
+++ b/libraries/ESP8266WiFi/examples/BearSSL_Validation/certs.h
@@ -1,7 +1,7 @@
 
 // this file is autogenerated - any modification will be overwritten
 // unused symbols will not be linked in the final binary
-// generated on 2021-07-18 00:02:22
+// generated on 2021-07-26 22:04:47
 // by ['../../../../tools/cert.py', '-s', 'www.gitlab.com', '-n', 'gitlab']
 
 #pragma once
diff --git a/libraries/ESP8266WiFi/examples/HTTPSRequest/certs.h b/libraries/ESP8266WiFi/examples/HTTPSRequest/certs.h
index 5e8afe355..04765d956 100644
--- a/libraries/ESP8266WiFi/examples/HTTPSRequest/certs.h
+++ b/libraries/ESP8266WiFi/examples/HTTPSRequest/certs.h
@@ -1,7 +1,7 @@
 
 // this file is autogenerated - any modification will be overwritten
 // unused symbols will not be linked in the final binary
-// generated on 2021-07-16 02:12:54
+// generated on 2021-07-26 22:04:48
 // by ['../../../../tools/cert.py', '-s', 'api.github.com', '-n', 'github']
 
 #pragma once
diff --git a/package.json b/package.json
index cec683a94..4f2b708ad 100644
--- a/package.json
+++ b/package.json
@@ -2,5 +2,5 @@
     "name": "framework-arduinoespressif8266",
     "description": "Arduino Wiring-based Framework (ESP8266 Core)",
     "url": "https://github.com/esp8266/Arduino",
-    "version": "3.1.0-dev"
+    "version": "3.0.2"
 }
diff --git a/package/README.md b/package/README.md
index 4925454b9..dfad8f5d9 100644
--- a/package/README.md
+++ b/package/README.md
@@ -173,7 +173,8 @@ The following points assume work in a direct clone of the repository, and not in
 
    * [platform.txt](https://github.com/esp8266/Arduino/blob/master/platform.txt)
    * [package.json](https://github.com/esp8266/Arduino/blob/master/package.json)
-   * [TZ.h](https://github.com/esp8266/Arduino/blob/master/cores/esp8266/TZ.h) (<= `cd tools; ./TZupdate.sh`)
+   * [TZ.h](https://github.com/esp8266/Arduino/blob/master/cores/esp8266/TZ.h) (<= `cd tools; sh ./TZupdate.sh`)
+   * Certificates (<= `cd tools; sh certsUpdate.sh`)
 
 - [ ] 5. Wait until the release notes have been checked by other maintainers (can be changed afterwards anyway)
 
diff --git a/platform.txt b/platform.txt
index 9f823d2c9..01ed01d76 100644
--- a/platform.txt
+++ b/platform.txt
@@ -5,8 +5,8 @@
 # For more info:
 # https://github.com/arduino/Arduino/wiki/Arduino-IDE-1.5-3rd-party-Hardware-specification
 
-name=ESP8266 Boards (3.1.0-dev)
-version=3.1.0-dev
+name=ESP8266 Boards (3.0.2)
+version=3.0.2
 
 # These will be removed by the packager script when doing a JSON release
 runtime.tools.xtensa-lx106-elf-gcc.path={runtime.platform.path}/tools/xtensa-lx106-elf