diff --git a/web-apache-mysql/alpine/README.md b/web-apache-mysql/alpine/README.md
index 03e426703..4471646c8 100644
--- a/web-apache-mysql/alpine/README.md
+++ b/web-apache-mysql/alpine/README.md
@@ -134,6 +134,10 @@ The variable is timezone in PHP format. Full list of supported timezones are ava
 
 The variable is visible Zabbix installation name in right top corner of the web interface.
 
+### `DB_DOUBLE_IEEE754`
+
+Use IEEE754 compatible value range for 64-bit Numeric (float) history values. Available since 5.0.0. Enabled by default.
+
 ### `ZBX_MAXEXECUTIONTIME`
 
 The varable is PHP ``max_execution_time`` option. By default, value is `300`.
diff --git a/web-apache-mysql/centos/README.md b/web-apache-mysql/centos/README.md
index 03e426703..4471646c8 100644
--- a/web-apache-mysql/centos/README.md
+++ b/web-apache-mysql/centos/README.md
@@ -134,6 +134,10 @@ The variable is timezone in PHP format. Full list of supported timezones are ava
 
 The variable is visible Zabbix installation name in right top corner of the web interface.
 
+### `DB_DOUBLE_IEEE754`
+
+Use IEEE754 compatible value range for 64-bit Numeric (float) history values. Available since 5.0.0. Enabled by default.
+
 ### `ZBX_MAXEXECUTIONTIME`
 
 The varable is PHP ``max_execution_time`` option. By default, value is `300`.
diff --git a/web-apache-mysql/ubuntu/README.md b/web-apache-mysql/ubuntu/README.md
index 03e426703..4471646c8 100644
--- a/web-apache-mysql/ubuntu/README.md
+++ b/web-apache-mysql/ubuntu/README.md
@@ -134,6 +134,10 @@ The variable is timezone in PHP format. Full list of supported timezones are ava
 
 The variable is visible Zabbix installation name in right top corner of the web interface.
 
+### `DB_DOUBLE_IEEE754`
+
+Use IEEE754 compatible value range for 64-bit Numeric (float) history values. Available since 5.0.0. Enabled by default.
+
 ### `ZBX_MAXEXECUTIONTIME`
 
 The varable is PHP ``max_execution_time`` option. By default, value is `300`.
diff --git a/web-apache-pgsql/alpine/README.md b/web-apache-pgsql/alpine/README.md
index 97f32a801..2c40fa491 100644
--- a/web-apache-pgsql/alpine/README.md
+++ b/web-apache-pgsql/alpine/README.md
@@ -132,6 +132,10 @@ The variable is timezone in PHP format. Full list of supported timezones are ava
 
 The variable is visible Zabbix installation name in right top corner of the web interface.
 
+### `DB_DOUBLE_IEEE754`
+
+Use IEEE754 compatible value range for 64-bit Numeric (float) history values. Available since 5.0.0. Enabled by default.
+
 ### `ZBX_MAXEXECUTIONTIME`
 
 The varable is PHP ``max_execution_time`` option. By default, value is `300`.
diff --git a/web-apache-pgsql/centos/README.md b/web-apache-pgsql/centos/README.md
index 97f32a801..2c40fa491 100644
--- a/web-apache-pgsql/centos/README.md
+++ b/web-apache-pgsql/centos/README.md
@@ -132,6 +132,10 @@ The variable is timezone in PHP format. Full list of supported timezones are ava
 
 The variable is visible Zabbix installation name in right top corner of the web interface.
 
+### `DB_DOUBLE_IEEE754`
+
+Use IEEE754 compatible value range for 64-bit Numeric (float) history values. Available since 5.0.0. Enabled by default.
+
 ### `ZBX_MAXEXECUTIONTIME`
 
 The varable is PHP ``max_execution_time`` option. By default, value is `300`.
diff --git a/web-apache-pgsql/ubuntu/README.md b/web-apache-pgsql/ubuntu/README.md
index 97f32a801..2c40fa491 100644
--- a/web-apache-pgsql/ubuntu/README.md
+++ b/web-apache-pgsql/ubuntu/README.md
@@ -132,6 +132,10 @@ The variable is timezone in PHP format. Full list of supported timezones are ava
 
 The variable is visible Zabbix installation name in right top corner of the web interface.
 
+### `DB_DOUBLE_IEEE754`
+
+Use IEEE754 compatible value range for 64-bit Numeric (float) history values. Available since 5.0.0. Enabled by default.
+
 ### `ZBX_MAXEXECUTIONTIME`
 
 The varable is PHP ``max_execution_time`` option. By default, value is `300`.
diff --git a/web-nginx-mysql/alpine/README.md b/web-nginx-mysql/alpine/README.md
index 0908b82ea..35218f518 100644
--- a/web-nginx-mysql/alpine/README.md
+++ b/web-nginx-mysql/alpine/README.md
@@ -134,6 +134,10 @@ The variable is timezone in PHP format. Full list of supported timezones are ava
 
 The variable is visible Zabbix installation name in right top corner of the web interface.
 
+### `DB_DOUBLE_IEEE754`
+
+Use IEEE754 compatible value range for 64-bit Numeric (float) history values. Available since 5.0.0. Enabled by default.
+
 ### `ZBX_MAXEXECUTIONTIME`
 
 The varable is PHP ``max_execution_time`` option. By default, value is `300`.
diff --git a/web-nginx-mysql/centos/README.md b/web-nginx-mysql/centos/README.md
index 0908b82ea..35218f518 100644
--- a/web-nginx-mysql/centos/README.md
+++ b/web-nginx-mysql/centos/README.md
@@ -134,6 +134,10 @@ The variable is timezone in PHP format. Full list of supported timezones are ava
 
 The variable is visible Zabbix installation name in right top corner of the web interface.
 
+### `DB_DOUBLE_IEEE754`
+
+Use IEEE754 compatible value range for 64-bit Numeric (float) history values. Available since 5.0.0. Enabled by default.
+
 ### `ZBX_MAXEXECUTIONTIME`
 
 The varable is PHP ``max_execution_time`` option. By default, value is `300`.
diff --git a/web-nginx-mysql/ubuntu/README.md b/web-nginx-mysql/ubuntu/README.md
index 0908b82ea..35218f518 100644
--- a/web-nginx-mysql/ubuntu/README.md
+++ b/web-nginx-mysql/ubuntu/README.md
@@ -134,6 +134,10 @@ The variable is timezone in PHP format. Full list of supported timezones are ava
 
 The variable is visible Zabbix installation name in right top corner of the web interface.
 
+### `DB_DOUBLE_IEEE754`
+
+Use IEEE754 compatible value range for 64-bit Numeric (float) history values. Available since 5.0.0. Enabled by default.
+
 ### `ZBX_MAXEXECUTIONTIME`
 
 The varable is PHP ``max_execution_time`` option. By default, value is `300`.
diff --git a/web-nginx-pgsql/alpine/README.md b/web-nginx-pgsql/alpine/README.md
index 4f2fb79ea..e9f821b57 100644
--- a/web-nginx-pgsql/alpine/README.md
+++ b/web-nginx-pgsql/alpine/README.md
@@ -132,6 +132,10 @@ The variable is timezone in PHP format. Full list of supported timezones are ava
 
 The variable is visible Zabbix installation name in right top corner of the web interface.
 
+### `DB_DOUBLE_IEEE754`
+
+Use IEEE754 compatible value range for 64-bit Numeric (float) history values. Available since 5.0.0. Enabled by default.
+
 ### `ZBX_MAXEXECUTIONTIME`
 
 The varable is PHP ``max_execution_time`` option. By default, value is `300`.
diff --git a/web-nginx-pgsql/centos/README.md b/web-nginx-pgsql/centos/README.md
index 4f2fb79ea..e9f821b57 100644
--- a/web-nginx-pgsql/centos/README.md
+++ b/web-nginx-pgsql/centos/README.md
@@ -132,6 +132,10 @@ The variable is timezone in PHP format. Full list of supported timezones are ava
 
 The variable is visible Zabbix installation name in right top corner of the web interface.
 
+### `DB_DOUBLE_IEEE754`
+
+Use IEEE754 compatible value range for 64-bit Numeric (float) history values. Available since 5.0.0. Enabled by default.
+
 ### `ZBX_MAXEXECUTIONTIME`
 
 The varable is PHP ``max_execution_time`` option. By default, value is `300`.
diff --git a/web-nginx-pgsql/ubuntu/README.md b/web-nginx-pgsql/ubuntu/README.md
index 4f2fb79ea..e9f821b57 100644
--- a/web-nginx-pgsql/ubuntu/README.md
+++ b/web-nginx-pgsql/ubuntu/README.md
@@ -132,6 +132,10 @@ The variable is timezone in PHP format. Full list of supported timezones are ava
 
 The variable is visible Zabbix installation name in right top corner of the web interface.
 
+### `DB_DOUBLE_IEEE754`
+
+Use IEEE754 compatible value range for 64-bit Numeric (float) history values. Available since 5.0.0. Enabled by default.
+
 ### `ZBX_MAXEXECUTIONTIME`
 
 The varable is PHP ``max_execution_time`` option. By default, value is `300`.