diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6961ea0f..7637fce6 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,13 @@
 Change Log
 ==========
 
+1.1.3
+-----
+
+### Fixed:
+
+ - Handle null `lastInstall` fields on hue lights' update state.
+
 1.1.2
 -----
 
diff --git a/lights/build.gradle.kts b/lights/build.gradle.kts
index b132fc4f..95ae6c57 100644
--- a/lights/build.gradle.kts
+++ b/lights/build.gradle.kts
@@ -21,4 +21,6 @@ dependencies {
     kapt(moshi("moshi-kotlin-codegen"))
     compile(okHttp())
     compile(threeTen())
+
+    testImplementation(jUnit())
 }
diff --git a/lights/src/main/kotlin/inkapplications/shade/lights/HueLightsApi.kt b/lights/src/main/kotlin/inkapplications/shade/lights/HueLightsApi.kt
index f86578b0..58e95cbe 100644
--- a/lights/src/main/kotlin/inkapplications/shade/lights/HueLightsApi.kt
+++ b/lights/src/main/kotlin/inkapplications/shade/lights/HueLightsApi.kt
@@ -285,10 +285,23 @@ data class ControlCapabilities(
  *           of this aren't documented anywhere I can find.
  * @property lastInstall Timestamp of the last firmware update.
  */
-@JsonClass(generateAdapter = true)
 data class UpdateState(
     val state: String,
-    @Json(name="lastinstall") val lastInstall: Instant
+    @Deprecated(
+        message = "Use lastKnownInstall to handle optional cases.",
+        replaceWith = ReplaceWith("lastKnownInstall")
+    )
+    val lastInstall: Instant,
+    val lastKnownInstall: Instant? = lastInstall
+)
+
+/**
+ * Internal representation of the [UpdateState] class for Json Transformation.
+ */
+@JsonClass(generateAdapter = true)
+internal data class HueUpdateState(
+    val state: String,
+    @Json(name="lastinstall") val lastInstall: Instant?
 )
 
 /**
diff --git a/lights/src/main/kotlin/inkapplications/shade/lights/HueUpdateStateTransformer.kt b/lights/src/main/kotlin/inkapplications/shade/lights/HueUpdateStateTransformer.kt
new file mode 100644
index 00000000..31e230ed
--- /dev/null
+++ b/lights/src/main/kotlin/inkapplications/shade/lights/HueUpdateStateTransformer.kt
@@ -0,0 +1,20 @@
+package inkapplications.shade.lights
+
+import com.squareup.moshi.FromJson
+import com.squareup.moshi.ToJson
+import org.threeten.bp.Instant
+
+internal object HueUpdateStateTransformer {
+    @ToJson
+    fun toHueFormat(state: UpdateState): HueUpdateState = HueUpdateState(
+        state = state.state,
+        lastInstall = state.lastKnownInstall.takeIf { it != Instant.MIN }
+    )
+
+    @FromJson
+    fun fromHueFormat(state: HueUpdateState): UpdateState = UpdateState(
+        state = state.state,
+        lastInstall = state.lastInstall ?: Instant.MIN,
+        lastKnownInstall = state.lastInstall
+    )
+}
diff --git a/lights/src/main/kotlin/inkapplications/shade/lights/ShadeLightsModule.kt b/lights/src/main/kotlin/inkapplications/shade/lights/ShadeLightsModule.kt
index cc091816..bb2f65c2 100644
--- a/lights/src/main/kotlin/inkapplications/shade/lights/ShadeLightsModule.kt
+++ b/lights/src/main/kotlin/inkapplications/shade/lights/ShadeLightsModule.kt
@@ -21,7 +21,8 @@ class ShadeLightsModule {
         TemperatureRangeTransformer,
         BrightnessTransformer,
         DurationTransformer,
-        HueLightStateTransformer
+        HueLightStateTransformer,
+        HueUpdateStateTransformer
     )
 
     /**
diff --git a/lights/src/test/kotlin/inkapplications/shade/lights/HueUpdateStateTransformerTest.kt b/lights/src/test/kotlin/inkapplications/shade/lights/HueUpdateStateTransformerTest.kt
new file mode 100644
index 00000000..8897cb4e
--- /dev/null
+++ b/lights/src/test/kotlin/inkapplications/shade/lights/HueUpdateStateTransformerTest.kt
@@ -0,0 +1,74 @@
+package inkapplications.shade.lights
+
+import junit.framework.TestCase.assertEquals
+import junit.framework.TestCase.assertNull
+import org.junit.Test
+import org.threeten.bp.Instant
+
+class HueUpdateStateTransformerTest {
+    @Test
+    fun fromHueFormat() {
+        val now = Instant.now()
+        val given = HueUpdateState("fake", now)
+
+        val result = HueUpdateStateTransformer.fromHueFormat(given)
+
+        assertEquals("State is not modified", "fake", result.state)
+        assertEquals("Last install is used in nullable", now, result.lastKnownInstall)
+        assertEquals("Last install is used in non-nullable field", now, result.lastInstall)
+    }
+
+    @Test
+    fun fromNullHueFormat() {
+        val given = HueUpdateState("fake", null)
+
+        val result = HueUpdateStateTransformer.fromHueFormat(given)
+
+        assertEquals("State is not modified", "fake", result.state)
+        assertNull("Nullable field should reflect null last install", result.lastKnownInstall)
+        assertEquals("Non-nullable field should use MIN as timestamp", Instant.MIN, result.lastInstall)
+    }
+
+    @Test
+    fun toHueFormatCompat() {
+        val now = Instant.now()
+        val given = UpdateState("fake", now)
+
+        val result = HueUpdateStateTransformer.toHueFormat(given)
+
+        assertEquals("State is not modified", "fake", result.state)
+        assertEquals("Nullable last install should be passed along", now, result.lastInstall)
+    }
+
+    @Test
+    fun toHueFormatCompatSpecified() {
+        val now = Instant.now()
+        val given = UpdateState("fake", Instant.MIN, now)
+
+        val result = HueUpdateStateTransformer.toHueFormat(given)
+
+        assertEquals("State is not modified", "fake", result.state)
+        assertEquals("Nullable field should take precedent if specified", now, result.lastInstall)
+    }
+
+    @Test
+    fun toHueFormatCompatNull() {
+        val now = Instant.now()
+        val given = UpdateState("fake", now, null)
+
+        val result = HueUpdateStateTransformer.toHueFormat(given)
+
+        assertEquals("State is not modified", "fake", result.state)
+        assertNull("Nullable field should take precedent if specified, even if null", result.lastInstall)
+    }
+
+    @Test
+    fun toHueFormatCompatNullFromMin() {
+        val given = UpdateState("fake", Instant.MIN)
+
+        val result = HueUpdateStateTransformer.toHueFormat(given)
+
+        assertEquals("State is not modified", "fake", result.state)
+        assertNull("Min instants should be interpreted as null for compatibility", result.lastInstall)
+    }
+}