diff --git a/README.md b/README.md
index 987de88f..a7016f1c 100644
--- a/README.md
+++ b/README.md
@@ -28,6 +28,8 @@ Airseeker can be configured via a combination of [environment variables](#enviro
 
 ### Environment variables
 
+All of the environment variables are optional and or set with default values for convenience.
+
 For example:
 
 ```sh
@@ -48,14 +50,16 @@ LOG_FORMAT=json
 LOG_LEVEL=info
 ```
 
-#### `LOGGER_ENABLED`
+#### `LOGGER_ENABLED` _(optional)_
 
 Enables or disables logging. Options:
 
 - `true` - Enables logging.
 - `false` - Disables logging.
 
-#### `LOG_FORMAT`
+Default: `true`.
+
+#### `LOG_FORMAT` _(optional)_
 
 The format of the log output. Options:
 
@@ -63,7 +67,9 @@ The format of the log output. Options:
 - `pretty` - Logs are formatted in a human-friendly "pretty" way. Ideal, when running the service locally and in
   development.
 
-#### `LOG_COLORIZE`
+Default: `json`.
+
+#### `LOG_COLORIZE` _(optional)_
 
 Enables or disables colors in the log output. Options:
 
@@ -71,7 +77,9 @@ Enables or disables colors in the log output. Options:
   Recommended when running locally and in development.
 - `false` - Disables colors in the log output. Recommended for production.
 
-#### `LOG_LEVEL`
+Default: `false`.
+
+#### `LOG_LEVEL` _(optional)_
 
 Defines the minimum level of logs. Logs with smaller level (severity) will be silenced. Options:
 
@@ -80,6 +88,8 @@ Defines the minimum level of logs. Logs with smaller level (severity) will be si
 - `warn` - Enables logs with level `warn` and `error`.
 - `error` - Enables logs with level `error`.
 
+Default: `info`.
+
 ### Configuration files
 
 Airseeker needs two configuration files, `airseeker.json` and `secrets.env`. All expressions of a form `${SECRET_NAME}`
diff --git a/src/config/schema.ts b/src/config/schema.ts
index e70454f2..8c76979b 100644
--- a/src/config/schema.ts
+++ b/src/config/schema.ts
@@ -119,8 +119,7 @@ export const chainsSchema = z
 export const deviationThresholdCoefficientSchema = z
   .number()
   .positive()
-  .optional() // Explicitly agreed to make this optional. See: https://github.com/api3dao/airseeker-v2/pull/20#issuecomment-1750856113.
-  .default(1)
+  .default(1) // Explicitly agreed to make this optional. See: https://github.com/api3dao/airseeker-v2/pull/20#issuecomment-1750856113.
   .superRefine((coefficient, ctx) => {
     // Check if the number has a maximum of two decimals
     const decimalCount = coefficient.toString().split('.')[1]?.length;