diff --git a/firebase-crashlytics/CHANGELOG.md b/firebase-crashlytics/CHANGELOG.md
index 65f3b86f462..6534e9a9402 100644
--- a/firebase-crashlytics/CHANGELOG.md
+++ b/firebase-crashlytics/CHANGELOG.md
@@ -1,5 +1,5 @@
 # Unreleased
-
+[changed] **Breaking Change**: Removed deprecated public constructor `KeyValueBuilder(crashlytics: FirebaseCrashlytics)`
 
 # 19.4.2
 * [changed] Internal changes to read version control info more efficiently [#6754]
diff --git a/firebase-crashlytics/api.txt b/firebase-crashlytics/api.txt
index 8cde5315a80..1112c32d2e8 100644
--- a/firebase-crashlytics/api.txt
+++ b/firebase-crashlytics/api.txt
@@ -44,7 +44,6 @@ package com.google.firebase.crashlytics {
   }
 
   public final class KeyValueBuilder {
-    ctor @Deprecated public KeyValueBuilder(com.google.firebase.crashlytics.FirebaseCrashlytics crashlytics);
     method public void key(String key, boolean value);
     method public void key(String key, double value);
     method public void key(String key, float value);
diff --git a/firebase-crashlytics/gradle.properties b/firebase-crashlytics/gradle.properties
index 5e690a3661f..ab70a1a2b5b 100644
--- a/firebase-crashlytics/gradle.properties
+++ b/firebase-crashlytics/gradle.properties
@@ -1,2 +1,2 @@
-version=19.4.3
+version=20.0.0
 latestReleasedVersion=19.4.2
diff --git a/firebase-crashlytics/src/androidTest/java/com/google/firebase/crashlytics/CrashlyticsTests.kt b/firebase-crashlytics/src/androidTest/java/com/google/firebase/crashlytics/CrashlyticsTests.kt
index 64f8ba8bfa6..63e9b76a5fb 100644
--- a/firebase-crashlytics/src/androidTest/java/com/google/firebase/crashlytics/CrashlyticsTests.kt
+++ b/firebase-crashlytics/src/androidTest/java/com/google/firebase/crashlytics/CrashlyticsTests.kt
@@ -83,22 +83,6 @@ class CrashlyticsTests {
     assertThat(result).isEqualTo(expectedKeys)
   }
 
-  @Test
-  fun keyValueBuilder_withCrashlyticsInstance() {
-    @Suppress("DEPRECATION") val keyValueBuilder = KeyValueBuilder(Firebase.crashlytics)
-    keyValueBuilder.key("string", "world")
-    keyValueBuilder.key("int", Int.MAX_VALUE)
-    keyValueBuilder.key("float", Float.MAX_VALUE)
-    keyValueBuilder.key("boolean", true)
-    keyValueBuilder.key("double", Double.MAX_VALUE)
-    keyValueBuilder.key("long", Long.MAX_VALUE)
-
-    val result: Map<String, String> = keyValueBuilder.build().keysAndValues
-
-    // The result is empty because it called crashlytics.setCustomKey for every key.
-    assertThat(result).isEmpty()
-  }
-
   companion object {
     private const val APP_ID = "1:1:android:1a"
     private const val API_KEY = "API-KEY-API-KEY-API-KEY-API-KEY-API-KEY"
diff --git a/firebase-crashlytics/src/main/java/com/google/firebase/crashlytics/KeyValueBuilder.kt b/firebase-crashlytics/src/main/java/com/google/firebase/crashlytics/KeyValueBuilder.kt
index 74d3793e215..85264ce0912 100644
--- a/firebase-crashlytics/src/main/java/com/google/firebase/crashlytics/KeyValueBuilder.kt
+++ b/firebase-crashlytics/src/main/java/com/google/firebase/crashlytics/KeyValueBuilder.kt
@@ -19,45 +19,39 @@ package com.google.firebase.crashlytics
 /** Helper class to enable convenient syntax in [setCustomKeys] and [recordException] */
 class KeyValueBuilder
 private constructor(
-  private val crashlytics: FirebaseCrashlytics?,
   private val builder: CustomKeysAndValues.Builder,
 ) {
-  @Deprecated(
-    "Do not construct this directly. Use `setCustomKeys` instead. To be removed in the next major release."
-  )
-  constructor(crashlytics: FirebaseCrashlytics) : this(crashlytics, CustomKeysAndValues.Builder())
-
-  internal constructor() : this(crashlytics = null, CustomKeysAndValues.Builder())
+  internal constructor() : this(CustomKeysAndValues.Builder())
 
   internal fun build(): CustomKeysAndValues = builder.build()
 
   /** Sets a custom key and value that are associated with reports. */
   fun key(key: String, value: Boolean) {
-    crashlytics?.setCustomKey(key, value) ?: builder.putBoolean(key, value)
+    builder.putBoolean(key, value)
   }
 
   /** Sets a custom key and value that are associated with reports. */
   fun key(key: String, value: Double) {
-    crashlytics?.setCustomKey(key, value) ?: builder.putDouble(key, value)
+    builder.putDouble(key, value)
   }
 
   /** Sets a custom key and value that are associated with reports. */
   fun key(key: String, value: Float) {
-    crashlytics?.setCustomKey(key, value) ?: builder.putFloat(key, value)
+    builder.putFloat(key, value)
   }
 
   /** Sets a custom key and value that are associated with reports. */
   fun key(key: String, value: Int) {
-    crashlytics?.setCustomKey(key, value) ?: builder.putInt(key, value)
+    builder.putInt(key, value)
   }
 
   /** Sets a custom key and value that are associated with reports. */
   fun key(key: String, value: Long) {
-    crashlytics?.setCustomKey(key, value) ?: builder.putLong(key, value)
+    builder.putLong(key, value)
   }
 
   /** Sets a custom key and value that are associated with reports. */
   fun key(key: String, value: String) {
-    crashlytics?.setCustomKey(key, value) ?: builder.putString(key, value)
+    builder.putString(key, value)
   }
 }