diff --git a/courier-java-core/src/main/kotlin/com/courier/models/ElementalImageNode.kt b/courier-java-core/src/main/kotlin/com/courier/models/ElementalImageNode.kt
index 7440c3ee..399a776e 100644
--- a/courier-java-core/src/main/kotlin/com/courier/models/ElementalImageNode.kt
+++ b/courier-java-core/src/main/kotlin/com/courier/models/ElementalImageNode.kt
@@ -48,7 +48,7 @@ private constructor(
         @JsonProperty("ref") @ExcludeMissing ref: JsonField<String> = JsonMissing.of(),
         @JsonProperty("src") @ExcludeMissing src: JsonField<String> = JsonMissing.of(),
         @JsonProperty("align") @ExcludeMissing align: JsonField<Alignment> = JsonMissing.of(),
-        @JsonProperty("altText") @ExcludeMissing altText: JsonField<String> = JsonMissing.of(),
+        @JsonProperty("alt_text") @ExcludeMissing altText: JsonField<String> = JsonMissing.of(),
         @JsonProperty("border_color")
         @ExcludeMissing
         borderColor: JsonField<String> = JsonMissing.of(),
@@ -123,7 +123,7 @@ private constructor(
      * @throws CourierInvalidDataException if the JSON field has an unexpected type (e.g. if the
      *   server responded with an unexpected value).
      */
-    fun altText(): Optional<String> = altText.getOptional("altText")
+    fun altText(): Optional<String> = altText.getOptional("alt_text")
 
     /**
      * CSS border color applied to the image. For example, `#ccc`
@@ -212,7 +212,7 @@ private constructor(
      *
      * Unlike [altText], this method doesn't throw if the JSON field has an unexpected type.
      */
-    @JsonProperty("altText") @ExcludeMissing fun _altText(): JsonField<String> = altText
+    @JsonProperty("alt_text") @ExcludeMissing fun _altText(): JsonField<String> = altText
 
     /**
      * Returns the raw JSON value of [borderColor].
diff --git a/courier-java-core/src/main/kotlin/com/courier/models/ElementalImageNodeWithType.kt b/courier-java-core/src/main/kotlin/com/courier/models/ElementalImageNodeWithType.kt
index 3df8aa7f..246b2f50 100644
--- a/courier-java-core/src/main/kotlin/com/courier/models/ElementalImageNodeWithType.kt
+++ b/courier-java-core/src/main/kotlin/com/courier/models/ElementalImageNodeWithType.kt
@@ -50,7 +50,7 @@ private constructor(
         @JsonProperty("ref") @ExcludeMissing ref: JsonField<String> = JsonMissing.of(),
         @JsonProperty("src") @ExcludeMissing src: JsonField<String> = JsonMissing.of(),
         @JsonProperty("align") @ExcludeMissing align: JsonField<Alignment> = JsonMissing.of(),
-        @JsonProperty("altText") @ExcludeMissing altText: JsonField<String> = JsonMissing.of(),
+        @JsonProperty("alt_text") @ExcludeMissing altText: JsonField<String> = JsonMissing.of(),
         @JsonProperty("border_color")
         @ExcludeMissing
         borderColor: JsonField<String> = JsonMissing.of(),
@@ -140,7 +140,7 @@ private constructor(
      * @throws CourierInvalidDataException if the JSON field has an unexpected type (e.g. if the
      *   server responded with an unexpected value).
      */
-    fun altText(): Optional<String> = altText.getOptional("altText")
+    fun altText(): Optional<String> = altText.getOptional("alt_text")
 
     /**
      * CSS border color applied to the image. For example, `#ccc`
@@ -235,7 +235,7 @@ private constructor(
      *
      * Unlike [altText], this method doesn't throw if the JSON field has an unexpected type.
      */
-    @JsonProperty("altText") @ExcludeMissing fun _altText(): JsonField<String> = altText
+    @JsonProperty("alt_text") @ExcludeMissing fun _altText(): JsonField<String> = altText
 
     /**
      * Returns the raw JSON value of [borderColor].
diff --git a/courier-java-core/src/main/kotlin/com/courier/models/ElementalQuoteNode.kt b/courier-java-core/src/main/kotlin/com/courier/models/ElementalQuoteNode.kt
index 9a5cd8d7..d9afb590 100644
--- a/courier-java-core/src/main/kotlin/com/courier/models/ElementalQuoteNode.kt
+++ b/courier-java-core/src/main/kotlin/com/courier/models/ElementalQuoteNode.kt
@@ -47,7 +47,7 @@ private constructor(
         @JsonProperty("ref") @ExcludeMissing ref: JsonField<String> = JsonMissing.of(),
         @JsonProperty("content") @ExcludeMissing content: JsonField<String> = JsonMissing.of(),
         @JsonProperty("align") @ExcludeMissing align: JsonField<Alignment> = JsonMissing.of(),
-        @JsonProperty("borderColor")
+        @JsonProperty("border_color")
         @ExcludeMissing
         borderColor: JsonField<String> = JsonMissing.of(),
         @JsonProperty("font_size") @ExcludeMissing fontSize: JsonField<String> = JsonMissing.of(),
@@ -122,7 +122,7 @@ private constructor(
      * @throws CourierInvalidDataException if the JSON field has an unexpected type (e.g. if the
      *   server responded with an unexpected value).
      */
-    fun borderColor(): Optional<String> = borderColor.getOptional("borderColor")
+    fun borderColor(): Optional<String> = borderColor.getOptional("border_color")
 
     /**
      * CSS px font size for this quote block, e.g. `16px`. Overrides the size of the `text_style`
@@ -205,7 +205,9 @@ private constructor(
      *
      * Unlike [borderColor], this method doesn't throw if the JSON field has an unexpected type.
      */
-    @JsonProperty("borderColor") @ExcludeMissing fun _borderColor(): JsonField<String> = borderColor
+    @JsonProperty("border_color")
+    @ExcludeMissing
+    fun _borderColor(): JsonField<String> = borderColor
 
     /**
      * Returns the raw JSON value of [fontSize].
diff --git a/courier-java-core/src/main/kotlin/com/courier/models/ElementalQuoteNodeWithType.kt b/courier-java-core/src/main/kotlin/com/courier/models/ElementalQuoteNodeWithType.kt
index 7c2cd50e..c07796f1 100644
--- a/courier-java-core/src/main/kotlin/com/courier/models/ElementalQuoteNodeWithType.kt
+++ b/courier-java-core/src/main/kotlin/com/courier/models/ElementalQuoteNodeWithType.kt
@@ -49,7 +49,7 @@ private constructor(
         @JsonProperty("ref") @ExcludeMissing ref: JsonField<String> = JsonMissing.of(),
         @JsonProperty("content") @ExcludeMissing content: JsonField<String> = JsonMissing.of(),
         @JsonProperty("align") @ExcludeMissing align: JsonField<Alignment> = JsonMissing.of(),
-        @JsonProperty("borderColor")
+        @JsonProperty("border_color")
         @ExcludeMissing
         borderColor: JsonField<String> = JsonMissing.of(),
         @JsonProperty("font_size") @ExcludeMissing fontSize: JsonField<String> = JsonMissing.of(),
@@ -138,7 +138,7 @@ private constructor(
      * @throws CourierInvalidDataException if the JSON field has an unexpected type (e.g. if the
      *   server responded with an unexpected value).
      */
-    fun borderColor(): Optional<String> = borderColor.getOptional("borderColor")
+    fun borderColor(): Optional<String> = borderColor.getOptional("border_color")
 
     /**
      * CSS px font size for this quote block, e.g. `16px`. Overrides the size of the `text_style`
@@ -227,7 +227,9 @@ private constructor(
      *
      * Unlike [borderColor], this method doesn't throw if the JSON field has an unexpected type.
      */
-    @JsonProperty("borderColor") @ExcludeMissing fun _borderColor(): JsonField<String> = borderColor
+    @JsonProperty("border_color")
+    @ExcludeMissing
+    fun _borderColor(): JsonField<String> = borderColor
 
     /**
      * Returns the raw JSON value of [fontSize].
diff --git a/courier-java-core/src/test/kotlin/com/courier/models/ElementalImageNodeTest.kt b/courier-java-core/src/test/kotlin/com/courier/models/ElementalImageNodeTest.kt
index c8415a9e..9d075a53 100644
--- a/courier-java-core/src/test/kotlin/com/courier/models/ElementalImageNodeTest.kt
+++ b/courier-java-core/src/test/kotlin/com/courier/models/ElementalImageNodeTest.kt
@@ -20,7 +20,7 @@ internal class ElementalImageNodeTest {
                 .ref("ref")
                 .src("src")
                 .align(Alignment.CENTER)
-                .altText("altText")
+                .altText("alt_text")
                 .borderColor("border_color")
                 .borderSize("border_size")
                 .href("href")
@@ -34,7 +34,7 @@ internal class ElementalImageNodeTest {
         assertThat(elementalImageNode.ref()).contains("ref")
         assertThat(elementalImageNode.src()).isEqualTo("src")
         assertThat(elementalImageNode.align()).contains(Alignment.CENTER)
-        assertThat(elementalImageNode.altText()).contains("altText")
+        assertThat(elementalImageNode.altText()).contains("alt_text")
         assertThat(elementalImageNode.borderColor()).contains("border_color")
         assertThat(elementalImageNode.borderSize()).contains("border_size")
         assertThat(elementalImageNode.href()).contains("href")
@@ -53,7 +53,7 @@ internal class ElementalImageNodeTest {
                 .ref("ref")
                 .src("src")
                 .align(Alignment.CENTER)
-                .altText("altText")
+                .altText("alt_text")
                 .borderColor("border_color")
                 .borderSize("border_size")
                 .href("href")
diff --git a/courier-java-core/src/test/kotlin/com/courier/models/ElementalQuoteNodeTest.kt b/courier-java-core/src/test/kotlin/com/courier/models/ElementalQuoteNodeTest.kt
index a309eba0..f213e413 100644
--- a/courier-java-core/src/test/kotlin/com/courier/models/ElementalQuoteNodeTest.kt
+++ b/courier-java-core/src/test/kotlin/com/courier/models/ElementalQuoteNodeTest.kt
@@ -21,7 +21,7 @@ internal class ElementalQuoteNodeTest {
                 .ref("ref")
                 .content("content")
                 .align(Alignment.CENTER)
-                .borderColor("borderColor")
+                .borderColor("border_color")
                 .fontSize("font_size")
                 .lineHeight("line_height")
                 .locales(
@@ -38,7 +38,7 @@ internal class ElementalQuoteNodeTest {
         assertThat(elementalQuoteNode.ref()).contains("ref")
         assertThat(elementalQuoteNode.content()).isEqualTo("content")
         assertThat(elementalQuoteNode.align()).contains(Alignment.CENTER)
-        assertThat(elementalQuoteNode.borderColor()).contains("borderColor")
+        assertThat(elementalQuoteNode.borderColor()).contains("border_color")
         assertThat(elementalQuoteNode.fontSize()).contains("font_size")
         assertThat(elementalQuoteNode.lineHeight()).contains("line_height")
         assertThat(elementalQuoteNode.locales())
@@ -61,7 +61,7 @@ internal class ElementalQuoteNodeTest {
                 .ref("ref")
                 .content("content")
                 .align(Alignment.CENTER)
-                .borderColor("borderColor")
+                .borderColor("border_color")
                 .fontSize("font_size")
                 .lineHeight("line_height")
                 .locales(