diff --git a/2.7-rc/alpine3.10/Dockerfile b/2.7-rc/alpine3.10/Dockerfile
index 981480b15..14e716653 100644
--- a/2.7-rc/alpine3.10/Dockerfile
+++ b/2.7-rc/alpine3.10/Dockerfile
@@ -12,8 +12,8 @@ RUN set -eux; \
 	} >> /usr/local/etc/gemrc
 
 ENV RUBY_MAJOR 2.7-rc
-ENV RUBY_VERSION 2.7.0-preview2
-ENV RUBY_DOWNLOAD_SHA256 fa39f088331f6d505154aa9d025aab177fdffedfbbabccd900b8c02e745bc077
+ENV RUBY_VERSION 2.7.0-preview3
+ENV RUBY_DOWNLOAD_SHA256 ad9d61e55ac224e3447a762e001965839846f9658f87a0e792840887cfe61b8c
 
 # some of ruby's build scripts are written in ruby
 #   we purge system ruby later to make sure our final image uses what we just built
diff --git a/2.7-rc/buster/Dockerfile b/2.7-rc/buster/Dockerfile
index 883da70d0..400fa0391 100644
--- a/2.7-rc/buster/Dockerfile
+++ b/2.7-rc/buster/Dockerfile
@@ -9,8 +9,8 @@ RUN set -eux; \
 	} >> /usr/local/etc/gemrc
 
 ENV RUBY_MAJOR 2.7-rc
-ENV RUBY_VERSION 2.7.0-preview2
-ENV RUBY_DOWNLOAD_SHA256 fa39f088331f6d505154aa9d025aab177fdffedfbbabccd900b8c02e745bc077
+ENV RUBY_VERSION 2.7.0-preview3
+ENV RUBY_DOWNLOAD_SHA256 ad9d61e55ac224e3447a762e001965839846f9658f87a0e792840887cfe61b8c
 
 # some of ruby's build scripts are written in ruby
 #   we purge system ruby later to make sure our final image uses what we just built
diff --git a/2.7-rc/buster/slim/Dockerfile b/2.7-rc/buster/slim/Dockerfile
index e9be1c2c2..b07559185 100644
--- a/2.7-rc/buster/slim/Dockerfile
+++ b/2.7-rc/buster/slim/Dockerfile
@@ -23,8 +23,8 @@ RUN set -eux; \
 	} >> /usr/local/etc/gemrc
 
 ENV RUBY_MAJOR 2.7-rc
-ENV RUBY_VERSION 2.7.0-preview2
-ENV RUBY_DOWNLOAD_SHA256 fa39f088331f6d505154aa9d025aab177fdffedfbbabccd900b8c02e745bc077
+ENV RUBY_VERSION 2.7.0-preview3
+ENV RUBY_DOWNLOAD_SHA256 ad9d61e55ac224e3447a762e001965839846f9658f87a0e792840887cfe61b8c
 
 # some of ruby's build scripts are written in ruby
 #   we purge system ruby later to make sure our final image uses what we just built