diff --git a/docs/source/user-guide/latest/compatibility/spark-versions.md b/docs/source/user-guide/latest/compatibility/spark-versions.md
index a6ad5bcf16..1005eded92 100644
--- a/docs/source/user-guide/latest/compatibility/spark-versions.md
+++ b/docs/source/user-guide/latest/compatibility/spark-versions.md
@@ -28,6 +28,10 @@ compatibility guide.
 
 Spark 3.4.3 is supported with Java 11/17 and Scala 2.12/2.13.
 
+```{warning}
+Spark 3.4 support is deprecated as of the 1.0.0 release and will be removed in the 1.1.0 release.
+```
+
 ### Known Limitations
 
 - **Reading `TimestampLTZ` as `TimestampNTZ`**: Spark 3.4 raises an error for this operation
@@ -43,6 +47,11 @@ Spark 3.4.3 is supported with Java 11/17 and Scala 2.12/2.13.
 
 Spark 3.5.8 is supported with Java 11/17 and Scala 2.12/2.13.
 
+```{warning}
+JDK 11 support is deprecated as of the 1.0.0 release and will be removed in the 1.1.0 release.
+We recommend moving to JDK 17 or later.
+```
+
 ### Known Limitations
 
 - **Reading `TimestampLTZ` as `TimestampNTZ`**: Spark 3.5 raises an error for this operation
diff --git a/docs/source/user-guide/latest/installation.md b/docs/source/user-guide/latest/installation.md
index 3bd1ec27ee..ea3cc348bd 100644
--- a/docs/source/user-guide/latest/installation.md
+++ b/docs/source/user-guide/latest/installation.md
@@ -45,6 +45,11 @@ in the [Compatibility Guide] for more information, such as known limitations per
 We recommend only using Comet with Spark versions where we currently have both Comet and Spark tests enabled in CI.
 Other versions may work well enough for development and evaluation purposes.
 
+```{warning}
+JDK 11 and Spark 3.4 support are deprecated as of the 1.0.0 release and will be removed in the 1.1.0 release.
+We recommend moving to JDK 17 or later and Spark 3.5 or later.
+```
+
 | Spark Version | Java Version | Scala Version | Comet Tests in CI | Spark SQL Tests in CI |
 | ------------- | ------------ | ------------- | ----------------- | --------------------- |
 | 3.4.3         | 11/17        | 2.12/2.13     | Yes               | Yes                   |